Retscher, G., Gabela, J., & Gikas, V. (2025). Lessons Learned from the LBS2ITS Project - An Interdisciplinary Approach for Curricula Development in Geomatics Education. Geomatics, 5(1), Article 2. https://doi.org/10.3390/geomatics5010002 ( reposiTUm)

Bandara, R. M. P. N. S., Jayasignhe, A. B., & Retscher, G. (2025). The Integration of IoT (Internet of Things) Sensors and Location-Based Services for Water Quality Monitoring: A Systematic Literature Review. Sensors, 25(6), Article 1918. https://doi.org/10.3390/s25061918 ( reposiTUm)

Perakis, H., Retscher, G., & Gikas, V. (2025). UWB/Wi-Fi RTT integration for personal mobility applications of CP user groups. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, X-G-2025, 631–640. https://doi.org/10.5194/isprs-annals-X-G-2025-631-2025 ( reposiTUm)

Sawandi, H., Jayasinghe, A., & Retscher, G. (2024). Real-time tracking data and machine learning approaches for mapping pedestrian walking behavior: a case study at the University of Moratuwa. Sensors, 24(12), Article 3822. https://doi.org/10.3390/s24123822 ( reposiTUm)

Retscher, G. (2024). Exploring the intersection of artificial intelligence and higher education: opportunities and challenges in the context of geomatics education. Applied Geomatics. https://doi.org/10.1007/s12518-024-00602-6 ( reposiTUm)

Rajavarathan, J., Retscher, G., & Gajanan, K. (2024). Implementation of GAGAN augmentation on smart mobile devices and development of a cooperative positioning architecture. Journal of Applied Geodesy, 18(3), 541–552. https://doi.org/10.1515/jag-2023-0056 ( reposiTUm)

Perakis, H., Gikas, V., & Retscher, G. (2024). Development of Advanced Positioning Techniques of UWB/Wi-Fi RTT Ranging for Personal Mobility Applications. Sensors, 24(23), Article 7520. https://doi.org/10.3390/s24237520 ( reposiTUm)

Retscher, G., Gikas, V., & Gabela, J. (2024). Experiences with techniques and sensors for smartphone positioning. Journal of Applied Geodesy, 19(3), 463–482. https://doi.org/10.1515/jag-2024-0048 ( reposiTUm)

Retscher, G. (2023). Indoor Navigation—User Requirements, State-of-the-Art and Developments for Smartphone Localization. Geomatics, 3(1), 1–46. https://doi.org/10.3390/geomatics3010001 ( reposiTUm)

Retscher, G., Kiss, D., & Gabela Majic, J. (2023). Fusion of GNSS Pseudoranges with UWB Ranges Based on Clustering and Weighted Least Squares. Sensors, 23(6), Article 3303. https://doi.org/10.3390/s23063303 ( reposiTUm)

Orfanos, M., Perakis, H., Gikas, V., Retscher, G., Mpimis, T., Spyropoulou, I., & Papathanasopoulou, V. (2023). Testing and Evaluation of Wi-Fi RTT Ranging Technology for Personal Mobility Applications. Sensors, 23(5), Article 2829. https://doi.org/10.3390/s23052829 ( reposiTUm)

Retscher, G., & Weigert, T. (2022). Assessment of a dual-frequency multi-GNSS smartphone for surveying applications. Applied Geomatics, 14, 765–784. https://doi.org/10.1007/s12518-022-00467-7 ( reposiTUm)

Retscher, G., Gabela Majic, J., & Gikas, V. (2022). PBeL—A Novel Problem-Based (e-)Learning for Geomatics Students. Geomatics, 2(1), 76–106. https://doi.org/10.3390/geomatics2010006 ( reposiTUm)

Retscher, G., & Leb, A. (2021). Development of a Smartphone-based University Library Navigation and Information Service Employing Wi-Fi Location Fingerprinting. Sensors, 21(2), 432. https://doi.org/10.3390/s21020432 ( reposiTUm)

Weigert, T., & Retscher, G. (2021). Untersuchung eines Smartphone mit Zweifrequenz-GNSS-Empfänger in verschiedenen Anwendungsszenarien im Vermessungswesen. Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), 109(2), 55–70. http://hdl.handle.net/20.500.12708/138426 ( reposiTUm)

Masiero, A., Toth, C., Gabela, J., Retscher, G., Kealy, A., Perakis, H., Gikas, V., & Grejner-Brzezinska, D. (2021). Experimental Assessment of UWB and Vision-Based Car Cooperative Positioning System. Remote Sensing, 13(23), 4858. https://doi.org/10.3390/rs13234858 ( reposiTUm)

Leb, A., & Retscher, G. (2020). Studie für ein campusweites Positionierungs- und Navigationssystem an der TU Wien basierend auf WLAN. Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), 108(4), 157–172. http://hdl.handle.net/20.500.12708/141859 ( reposiTUm)

Gikas, V., Retscher, G., Kahmen, H., Neuner, H., & Rizos, C. (2020). Editorial to the Special Edition of the JAG on Deformation Monitoring. Journal of Applied Geodesy, 14(2), 119. https://doi.org/10.1515/jag-2020-0018 ( reposiTUm)

Retscher, G., & Bekenova, A. (2020). Urban Wi-Fi Fingerprinting Along a Public Transport Route. Journal of Applied Geodesy, 14(4), 379–392. https://doi.org/10.1515/jag-2020-0015 ( reposiTUm)

Retscher, G. (2020). Fundamental Concepts and Evolution of Wi-Fi User Localization: An Overview Based on Different Case Studies. Sensors, 20(18), 5121. https://doi.org/10.3390/s20185121 ( reposiTUm)

Retscher, G., Kealy, A., Gabela, J., Li, Y., Goel, S., Toth, C. K., Masiero, A., Błaszczak-Bąk, W., Gikas, V., Perakis, H., Koppanyi, Z., & Grejner-Brzezinska, D. (2020). A Benchmarking Measurement Campaign in GNSS-denied/challenged Indoor/Outdoor and Transitional Environments. Journal of Applied Geodesy, 14(2), 215–229. https://doi.org/10.1515/jag-2019-0031 ( reposiTUm)

Retscher, G., Kleine, J., & Whitemore, L. (2019). Trilateration Approaches for Seamless Out-/Indoor GNSS and Wi-Fi Smartphone Positioning. Journal of Applied Geodesy, 13(1), 47–61. https://doi.org/10.1515/jag-2018-0022 ( reposiTUm)

Retscher, G., & Leb, A. (2019). Indoor WLAN Fingerprinting mittels kinematischen Trainingsmessungen. Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), 107(1), 27–43. http://hdl.handle.net/20.500.12708/142305 ( reposiTUm)

Gabela, J., Retscher, G., Goel, S., Perakis, H., Masiero, A., Toth, C., Gikas, V., Kealy, A., Koppányi, Z., Błaszczak-Bąk, W., Li, Y., & Grejner-Brzezinska, D. (2019). Experimental Evaluation of a UWB-Based Cooperative Positioning System for Pedestrians in GNSS-Denied Environment. Sensors, 19(23), 5274. https://doi.org/10.3390/s19235274 ( reposiTUm)

Retscher, G., Gikas, V., Hofer, H., Perakis, H., & Kealy, A. (2019). Range validation of UWB and Wi-Fi for integrated indoor positioning. Applied Geomatics, 187–195. https://doi.org/10.1007/s12518-018-00252-5 ( reposiTUm)

Retscher, G., & Obex, F. (2018). A Cooperative Positioning Service for Multi-modal Public Transit Situations. Journal of Navigation, 71(2), 371–388. https://doi.org/10.1017/s0373463317000686 ( reposiTUm)

Retscher, G., Kleine, J., & Whitemore, L. (2018). Trilaterationsansätze für WLAN Positionierung in Gebäuden. Allgemeine Vermessungs-Nachrichten, 125(8–9), 264–273. http://hdl.handle.net/20.500.12708/145399 ( reposiTUm)

Li, Y., Williams, S., Moran, B., Kealy, A., & Retscher, G. (2018). High-Dimensional Probabilistic Fingerprinting in Wireless Sensor Networks Based on a Multivariate Gaussian Mixture Model. Sensors, 18(8), 2602. https://doi.org/10.3390/s18082602 ( reposiTUm)

Goel, S., Kealy, A., Gikas, V., Retscher, G., Toth, C., Brzezinska, D.-G., & Lohani, B. (2017). Cooperative Localization of Unmanned Aerial Vehicles Using GNSS, MEMS Inertial, and UWB Sensors. Journal of Surveying Engineering, 143(4). https://doi.org/10.1061/(asce)su.1943-5428.0000230 ( reposiTUm)

Retscher, G., & Hofer, H. (2017). Wi-Fi Location Fingerprinting Using an Intelligent Checkpoint Sequence. Journal of Applied Geodesy, 11(3). https://doi.org/10.1515/jag-2016-0030 ( reposiTUm)

Neuner, H., Retscher, G., Kahmen, H., & Rizos, C. (2017). Editorial to the Special Edition on Deformation Monitoring. Journal of Applied Geodesy, 11(2). https://doi.org/10.1515/jag-2017-0010 ( reposiTUm)

Kealy, A., & Retscher, G. (2017). MEMS and Wireless Options - User Localization in Cellular Phones. GPS World, 28(7), 22–28. http://hdl.handle.net/20.500.12708/147057 ( reposiTUm)

Hofer, H., & Retscher, G. (2017). Seamless Navigation Using GNSS and Wi-Fi/IN with Intelligent Checkpoints. Journal of Location Based Services, 11(3–4), 204–221. https://doi.org/10.1080/17489725.2017.1415385 ( reposiTUm)

Retscher, G., & Tatschl, T. (2017). Positionierung in Gebäuden mit differenziellem WLAN. Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 142(2), 111–125. https://doi.org/10.12902/zfv-0149-2016 ( reposiTUm)

Retscher, G., & Tatschl, T. (2017). Indoor Positioning with Differential Wi-Fi Lateration. Journal of Applied Geodesy, 11(4). https://doi.org/10.1515/jag-2017-0011 ( reposiTUm)

Neuner, H., & Retscher, G. (2016). Editorial to the Special Edition on Deformation Monitoring. Journal of Applied Geodesy, 10(1), 1–3. https://doi.org/10.1515/jag-2015-0032 ( reposiTUm)

Hofer, H., & Retscher, G. (2016). Smartphone Navigation anhand von “intelligenten Check-Points.” Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), Begutachteter Beitrag, 104(2), 61–71. http://hdl.handle.net/20.500.12708/149194 ( reposiTUm)

Gikas, V., Antoniou, C., Retscher, G., Panagopoulos, A., Kealy, A., Perakis, H., & Mpimis, T. (2016). A Low-Cost Wireless Sensors Positioning Solution for Indoor Parking Facilities Management. Journal of Location Based Services, 10(4), 241–261. https://doi.org/10.1080/17489725.2016.1231351 ( reposiTUm)

Retscher, G., & Obex, F. (2015). InKoPoMoVer - Cooperative Positioning for Real-time User Assistance and Guidance at Multi-modal Public Transit Junctions. Journal of Applied Geodesy, 9(3). https://doi.org/10.1515/jag-2015-0006 ( reposiTUm)

Retscher, G., & Obex, F. (2015). Ubiquitous User Localization in LBS - The Need for Implementing Ethical Thinking in Our Research Field. Journal of Applied Geodesy, 9(4). https://doi.org/10.1515/jag-2015-0015 ( reposiTUm)

Kealy, A., Retscher, G., Toth, C., Hasnur-Rabiain, A., Gikas, V., Grejner-Brzezinska, D., Danezis, C., & Moore, T. (2015). Collaborative Navigation as a Solution for PNT Applications in GNSS Challenged Environments - Report on Field Trials of a Joint FIG/IAG Working Group. Journal of Applied Geodesy, 9(4). https://doi.org/10.1515/jag-2015-0014 ( reposiTUm)

Retscher, G., & Heuböck, S. (2015). Performance Evaluation of the Use of a Low-cost High Sensitivity GPS (HS-GPS) Receiver in Forests. Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), Begutachteter Beitrag, 103(2+3), 174–181. http://hdl.handle.net/20.500.12708/151210 ( reposiTUm)

Retscher, G., & Kabashi, I. (2014). Possibilities of Using Radio Frequency Identification (RFID) for Disaster Management. Journal Micro Macro & Mezzo Geo Information, 1(2), 1–5. http://hdl.handle.net/20.500.12708/157263 ( reposiTUm)

Retscher, G., & Obex, F. (2014). Collaborative Navigation and Guidance in Underground Networks Using RFID. Coordinates, 10(7), 8–10. http://hdl.handle.net/20.500.12708/157264 ( reposiTUm)

Bai, Y. B., Wu, S., Retscher, G., Kealy, A., Holden, L., Tomko, M., Borriak, A., Hu, B., Wu, H. R., & Zhang, K. (2014). A New Method for Improving Wi-Fi Based Indoor Positioning Accuracy. Journal of Location Based Services, 8(3), 135–147. https://doi.org/10.1080/17489725.2014.977362 ( reposiTUm)

Retscher, G. (2014). Editorial to the Special Edition of the JAG on Engineering Geodesy. Journal of Applied Geodesy, 8(4). https://doi.org/10.1515/jag-2014-0023 ( reposiTUm)

Yu, K., Oppermann, I., Dutkiewicz, E., Sharp, I., & Retscher, G. (2014). Indoor Navigation and Tracking. Physical Communication, 13, 1–3. https://doi.org/10.1016/j.phycom.2014.02.003 ( reposiTUm)

Kealy, A., Retscher, G., & Schwieger, V. (2013). Preface to the Special Edition of the JAG on Ubiquitous Positioning and Navigation Systems. Journal of Applied Geodesy, 7(4). https://doi.org/10.1515/jag-2013-0018 ( reposiTUm)

Retscher, G. (2012). Preface to the Special Issue on Multi-sensor Systems in Engineering Geodesy and Navigation. Journal of Applied Geodesy, 6(1), 1–2. http://hdl.handle.net/20.500.12708/163589 ( reposiTUm)

Niemeier, W., Retscher, G., & Ding, X. (2012). Editorial: Special Issue on Deformation Monitoring. Journal of Applied Geodesy, 6(3–4). https://doi.org/10.1515/jag-2012-0099 ( reposiTUm)

Mok, E., Lau, F., Xia, L., Retscher, G., & Tian, H. (2012). Influential Factors for Decimetre Level Positioning Using Ultra Wide Band Technology. Survey Review, 44(324), 37–44. http://hdl.handle.net/20.500.12708/163576 ( reposiTUm)

Mok, E., Xia, L., Retscher, G., & Hui, T. (2010). A Case Study on the Feasibility and Performance of an UWB-AoA Real Time Location System for Resources Management of Civil Construction Projects. Journal of Applied Geodesy, 4(1), 23–32. http://hdl.handle.net/20.500.12708/167484 ( reposiTUm)

Fu, Q., & Retscher, G. (2009). Another Look Indoors. GPS World, 20(3), 40–43. http://hdl.handle.net/20.500.12708/165570 ( reposiTUm)

Liu, G.-J., Zhang, K., Wu, F., Densley, L., & Retscher, G. (2009). Characterisation of Current and Future GNSS Performance in Urban Canyons Using a High Quality 3-D Urban Model of Melbourne, Australia. Journal of Applied Geodesy, 3(1), 15–24. http://hdl.handle.net/20.500.12708/165571 ( reposiTUm)

Fu, Q., & Retscher, G. (2009). Active RFID Trilateration and Location Fingerprinting Based on RSSI for Pedestrian Navigation. The Journal of Navigation, 62(2 (April)), 323–340. http://hdl.handle.net/20.500.12708/165282 ( reposiTUm)

Retscher, G., & Fu, Q. (2009). An Intelligent Personal Navigator Integrating GNSS, RFID and INS for Continuous Position Determination. Boletim de Ciencias Geodesicas, 15(5), 707–724. http://hdl.handle.net/20.500.12708/167501 ( reposiTUm)

Böhm, J., & Retscher, G. (2009). Geodesy for Planet Earth - Session 4 Positioning and Applications. Zeitschrift Für Geodäsie, Geoinformation Und Landmanagement (Zfv), 6(134. Jahrgang), 377–378. http://hdl.handle.net/20.500.12708/167546 ( reposiTUm)

Retscher, G., & Fu, Q. (2008). Active RFID Trilateration for Indoor Positioning. Coordinates, IV(5), 10–15. http://hdl.handle.net/20.500.12708/170453 ( reposiTUm)

Kealy, A., Retscher, G., & Winter, S. (2007). Next Generation Mobile Mapping Systems - Strategies for Development. European Journal of Navigation, 5(3), 6–13. http://hdl.handle.net/20.500.12708/168912 ( reposiTUm)

Retscher, G. (2007). Augmentation of Indoor Positioning Systems with a Barometric Pressure Sensor for Direct Altitude Determination in a Multi-storey Building. Cartography and Geographic Information Science, 34(4), 305–310. http://hdl.handle.net/20.500.12708/168913 ( reposiTUm)

Retscher, G. (2007). A Knowledge-based Kalman Filter for an Intelligent Pedestrian Navigation System. Survey Review, 39(306), 282–293. http://hdl.handle.net/20.500.12708/168914 ( reposiTUm)

Retscher, G., & Mok, E. (2007). Testing of Location Systems using WiFi in Indoor Environments. Coordinates, III(10), 6–11. http://hdl.handle.net/20.500.12708/168915 ( reposiTUm)

Mok, E., & Retscher, G. (2007). Location Determination Using WiFi - Fingerprinting Versus WiFi - Trilateration. Journal of Location Based Services, 1(2), 145–159. http://hdl.handle.net/20.500.12708/168916 ( reposiTUm)

Retscher, G. (2007). Test and Integration of Location Sensors for a Multi-sensor Personal Navigatior. The Journal of Navigation, 60(1), 107–117. http://hdl.handle.net/20.500.12708/168878 ( reposiTUm)

Retscher, G., Moser, E., Vredeveld, D., Heberling, D., & Pamp, J. (2007). Performance and Accuracy Test of a WiFi Indoor Positioning System. Journal of Applied Geodesy, 1(2), 103–110. http://hdl.handle.net/20.500.12708/168881 ( reposiTUm)

Retscher, G. (2007). Investigations of Selected Systems for Indoor and Pedestrian Navigation. Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), Begutachteter Spezialband, 95(2), 166–172. http://hdl.handle.net/20.500.12708/168880 ( reposiTUm)

Kealy, A., Winter, S., & Retscher, G. (2007). Intelligent Location Models for Next Generation Location-based Services. Journal of Location Based Services, 1(4), 237–255. http://hdl.handle.net/20.500.12708/170452 ( reposiTUm)

Retscher, G., & Moser, E. (2007). Genauigkeits- und Leistungstest eines WLAN Indoor Positionierungssystems. Zeitschrift Für Geodäsie, Geoinformation Und Landmanagement (Zfv), 132(1), 4–10. http://hdl.handle.net/20.500.12708/168879 ( reposiTUm)

Retscher, G., & Thienelt, M. (2006). NAVIO - A Navigation Service of Pedestrians. Journal of Space Communication, GLOBAL NAVIGATION(9), 10. http://hdl.handle.net/20.500.12708/172223 ( reposiTUm)

Retscher, G., & Kealy, A. (2006). Ubiquitous Positioning Technologies for Modern Intelligent Navigation Systems. The Journal of Navigation, 59(1), 91–103. http://hdl.handle.net/20.500.12708/172220 ( reposiTUm)

Retscher, G. (2006). 3-D Location Determination in Multi-storey Buildings. European Journal of Navigation, 4(3), 49–54. http://hdl.handle.net/20.500.12708/172222 ( reposiTUm)

Retscher, G., Zhang, K., Zhang, S., & Wang, Y. (2006). RFID and GNSS for Indoor and Outdoor Positioning - Two Different Case Studies. European Journal of Navigation, 4(5), 49–54. http://hdl.handle.net/20.500.12708/172253 ( reposiTUm)

Retscher, G. (2006). NAVIO - Integration of GNSS with Other Sensors for Pedestrian Navigation. Location Magazine, 1(9–10). http://hdl.handle.net/20.500.12708/172241 ( reposiTUm)

Retscher, G., Thienelt, M., & Hiller, C. (2006). NAVIO - Ein Multisensorsystem für die Positionsbestimmung von Fußgängern. The Navigation View, Magazin Des Österreichischen Vereins Für Navigation (OVN), 6(II), 5–13. http://hdl.handle.net/20.500.12708/172240 ( reposiTUm)

Retscher, G., & Hiller, C. (2006). Test und Integration von Sensoren für die Positonsbestimmung in einem Fußgängernavigationssystem. Zeitschrift Für Geodäsie, Geoinformation Und Landmanagement (Zfv), 131(6), 345–351. http://hdl.handle.net/20.500.12708/172254 ( reposiTUm)

Retscher, G., & Kistenich, M. (2006). Vergleich von Systemen zur Positionsbestimmung und Navigation in Gebäuden. Zeitschrift Für Geodäsie, Geoinformation Und Landmanagement (Zfv), 131(1), 25–35. http://hdl.handle.net/20.500.12708/172221 ( reposiTUm)

Retscher, G. (2005). Höhenbestimmung in einem Gebäude mit einem digitalen Barometer für die Navigation von Fußgängern. Allgemeine Vermessungs-Nachrichten (AVN), 112(10), 348–354. http://hdl.handle.net/20.500.12708/172173 ( reposiTUm)

Retscher, G., Mok, E., & Yan, W. (2005). Performance Test of Location-based Services in Hong Kong. European Journal of Navigation, 3(3), 22–27. http://hdl.handle.net/20.500.12708/172176 ( reposiTUm)

Gartner, G., Radoczky, V., & Retscher, G. (2005). Location technologies for pedestrian navigation. GIS Development, 9(4), 22–25. http://hdl.handle.net/20.500.12708/172172 ( reposiTUm)

Retscher, G. (2004). Allgegenwärtige Positionierungsmethoden für Moderne und Intelligente Navigationssysteme und -dienste. Österreichische Zeitschrift Für Vermessung Und Geoinformation (VGI), 92(3–4), 136–144. http://hdl.handle.net/20.500.12708/174587 ( reposiTUm)

Retscher, G., & Thienelt, M. (2004). NAVIO - A Navigation and Guidance Service for Pedestrians. Journal of Global Positioning Systems (Print Version), 3(1–2), 208–217. http://hdl.handle.net/20.500.12708/174588 ( reposiTUm)

Retscher, G. (2002). Accuracy Performance of Virtual Reference Station (VRS) Networks. Journal of Global Positioning Systems (Print Version), 1(1), 40–47. http://hdl.handle.net/20.500.12708/174579 ( reposiTUm)

Rajavarathan, J., Retscher, G., Gabela, J., Gajanan, K., & Divithure, H. (2024). Analysis of the Usability of an SBAS Correction Solution for Smart Mobile Devices. In Proceedings of the 2024 International Technical Meeting of The Institute of Navigation (pp. 54–67). https://doi.org/10.33012/2024.19562 ( reposiTUm)

Retscher, G., & Brezovsky, M. (2024). Assessment of a Dual-frequency Carrier Phase Multi-Constellation Enabled Smartphone. In Proceedings of the ION 2024 Pacific PNT Meeting (pp. 377–390). https://doi.org/10.33012/2024.19643 ( reposiTUm)

Maduranga, M. W. P., Kalansooriya, P., Retscher, G., & Gabela Majic, J. (2023). Machine Learning-Based Indoor Localization System to Support 5G Location-Based Services. In 2023 7th SLAAI International Conference on Artificial Intelligence (SLAAI-ICAI) (pp. 1–6). IEEE. https://doi.org/10.1109/SLAAI-ICAI59257.2023.10365026 ( reposiTUm)

Gabela, J., & Retscher, G. (2023). Interdisciplinary Approach to Curricula Development in Geomatics Education: Erasmus+ LBS2ITS Project. In W. Chen, L. Halounová, S. Kumar, & W. Yao (Eds.), Volume X-5/W1-2023, 2023 | ISPRS TC V International Conference on Geomatics Education – Challenges and Prospects (ICGE22) (pp. 19–26). ISPRS, Copernicus Publications. https://doi.org/10.5194/isprs-annals-X-5-W1-2023-19-2023 ( reposiTUm)

Sivarasa, I., Rajavarathan, J., Retscher, G., Abeyratne, V., Dammalage, T., Gabela, J., & Gikas, V. (2023). Performance Assessment of Positioning Solutions of Different Mobile Devices Using Kalman Filtering. In A. Guarnieri, A. Masiero, F. Pirotti, & A. Vettore (Eds.), Volume XLVIII-1/W1-2023, 2023 | ISPRS TC I (WG I/2). 12th International Symposium on Mobile Mapping Technology (MMT 2023) (pp. 451–456). https://doi.org/10.5194/isprs-archives-XLVIII-1-W1-2023-451-2023 ( reposiTUm)

Slateff, A., & Retscher, G. (2022). Data Quality and Outdoor Positioning Accuracy of Recent Smartphones with Dual Frequency GNSS Receivers. In Proceedings of FIG Congress 2022. Volunteering for the future - Geospatial excellence for a better living. XXVII FIG Congress, Warsaw, Poland. https://doi.org/10.34726/3185 ( reposiTUm)

Gartner, G., Binn, A., Gabela, J., Retscher, G., Gikas, V., Schmidt, M., & Wang, W. (2022). From project-based to problem-based learning in engineering disciplines: enhancing Cartography and Geomatics education. In 8th International Conference on Higher Education Advances (HEAd’22). 8th International Conference on Higher Education Advances (HEAd´22), Valencia, Spain. https://doi.org/10.4995/head22.2022.14473 ( reposiTUm)

Gabela Majic, J., Retscher, G., Gartner, G., Binn, A., Gikas, V., Spyropoulou, I., Gerike, R., Ratnayake, R., Jayasinghe, A., Perera, L., Kalansooriya, P., Pradeep, R., Hewawasam, C., Dammalage, T., & Abeyratne, V. (2022). Overview of the PBL in Geodesy, Geoinformatics and Transport Engineering Education. In Proceedings of FIG Congress 2022 Volunteering for the future - Geospatial excellence for a better living. XXVII FIG Congress, Warsaw, Poland. http://hdl.handle.net/20.500.12708/78061 ( reposiTUm)

Masiero, A., Toth, C., Gabela, J., & Retscher, G. (2022). Ananalysis of the Performance of an UWB-based Cooperative Positioning for Different Car Platoon Configurations. In S. Zlatanova, G. Sithole, & J. Barton (Eds.), XXIV ISPRS Congress “Imaging today, foreseeing tomorrow”, Commission IV (pp. 467–472). https://doi.org/10.5194/isprs-archives-XLIII-B1-2022-467-2022 ( reposiTUm)

Gabela, J., Retscher, G., Masiero, A., & Toth, C. (2022). Seamless Indoor-Outdoor Transitioning of Pedestrian Platforms. In A. Kealy (Ed.), Programm 2nd Symposium of IAG Commission 4 “Positioning and Applications. https://doi.org/10.5194/iag-comm4-2022-5 ( reposiTUm)

Gerike, R., Gabela Majic, J., Heidegger Fabian, Retscher, G., Gartner, G., Binn, A., Gikas, V., Spyropuulou, I., Ratnayake, R., Buddhika Jayasinghe, A., Perera, L., Kalassooriya, P., Pradeep, R., Hewawasam, C., Dammalage, T., Abeyratne, V., & Rajavarathan, J. (2022). Education of Location-based Services for Intelligent Transport Services as the Basis for Interdisciplinary Innovation in Transportation. In Proceedings of the Positioning and Navigation for Intelligent Transport Systems’ POSNAV 2022. Positioning and Navigation for Intelligent Transport Systems POSNAV 2022, Berlin, Germany. DGON. http://hdl.handle.net/20.500.12708/136967 ( reposiTUm)

Gabela, J., Retscher, G., Masiero, A., & Toth, C. K. (2022). Seamless Indoor-Outdoor Transitioning of Pedestrian Platforms. In 2nd Symposium of IAG Commission 4 “Positioning and Applications.” 2nd Symposium of IAG Commission 4 “Positioning and Applications,” Germany. https://doi.org/10.5194/iag-comm4-2022-5 ( reposiTUm)

Zariqi, P., & Retscher, G. (2022). Bluetooth Low Energy (BLE) for Covid 19 Contact Tracing Using Smartphones in Four Different Scenarios. In Proceedings of FIG Congress 2022. Volunteering for the future - Geospatial excellence for a better living. XXVII FIG Congress, Warsaw, Poland. https://doi.org/10.34726/3121 ( reposiTUm)

Retscher, G., Zariqi, P., & Gartner, G. (2021). Analyses of Bluetooth Distance Measurements for Digital Contact Tracing. In International Symposium on Geospatial Approaches to Combating Covid-19 (p. 5). http://hdl.handle.net/20.500.12708/44097 ( reposiTUm)

Leb, A., & Retscher, G. (2021). Study for the Development of a Guidance and Information System Based on Wi Fi for TU Wien. In FIG Working Week 2021 20 - 25 June Smart Surveyors for Land and Water Management Challenges in a new Reality (p. 15). http://hdl.handle.net/20.500.12708/44081 ( reposiTUm)

Retscher, G., Gikas, V., & Gerike, R. (2021). Curricula Enrichment for Sri Lankan Universities Delivered through the Application of Location-Based Services to Intelligent Transport Systems. In FIG eWorking Week 2021 (p. 16). http://hdl.handle.net/20.500.12708/44080 ( reposiTUm)

Retscher, G., & Leb, A. (2021). Development of a Navigation and Information Service for a University Library. In Proceedings of the 2021 International Technical Meeting of The Institute of Navigation. 2021 International Technical Meeting ION ITM, Unknown. https://doi.org/10.33012/2021.17815 ( reposiTUm)

Masiero, A., Toth, C., Gabela, J., & Retscher, G. (2021). ASSESSMENT OF CAR COLLABORATIVE POSITIONING WITH UWB AND VISION. In The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 221–227). https://doi.org/10.5194/isprs-archives-xliii-b1-2021-221-2021 ( reposiTUm)

Weigert, T., & Retscher, G. (2021). Positioning Performance Evaluation of a Dual Frequency Multi-GNSS Smartphone. In A. Basiri, G. Gartner, & H. Huang (Eds.), LBS 2021: Proceedings of the 16th International Conference on Location Based Services (pp. 42–62). https://doi.org/10.34726/1749 ( reposiTUm)

Błaszczak-Bąk, W., Retscher, G., Joanna, J., Uradziński, M., Bednarczyk, M., & Gabela, J. (2021). Dual-frequency GNSS/Wi-Fi Smartphone Navigation. In A. Basiri, G. Gartner, & H. Huang (Eds.), LBS 2021: Proceedings of the 16th International Conference on Location Based Services (pp. 82–87). https://doi.org/10.34726/1752 ( reposiTUm)

Retscher, G., Zariqi, P., Pinilla Pachon, A. O., Ceballos Cantu, J. P., & Madawalagama, S. (2021). Bluetooth Distance Estimation for COVID-19 Contact Tracing. In A. Basiri, G. Gartner, & H. Huang (Eds.), LBS 2021: Proceedings of the 16th International Conference on Location Based Services (pp. 27–41). https://doi.org/10.34726/1748 ( reposiTUm)

Retscher, G., & Bekenova, A. (2020). Urban Wi-Fi RSSI Analysis along a Public Transport Route for Kinematic Localization. In 2020 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE/ION Plans 2020, Portland, United States of America (the). IEEE. https://doi.org/10.1109/plans46316.2020.9110240 ( reposiTUm)

Cheng, W., Dai, Y., El-Sheimy, N., Wen, C., Retscher, G., Kang, Z., & Lingua, A. (2020). ISPRS BENCHMARK ON MULTISENSORY INDOOR MAPPING AND POSITIONING. In ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 117–123). https://doi.org/10.5194/isprs-annals-v-5-2020-117-2020 ( reposiTUm)

Bai, Y. B., Kealy, A., Retscher, G., & Hoden, L. (2020). A Comparative Evaluation of Wi-Fi RTT and GPS Based Positioning. In International Global Navigation Satellite Systems (IGNSS) 2020 (p. 12). http://hdl.handle.net/20.500.12708/44028 ( reposiTUm)

Rajavarathan, J., Dammalage, T., Retscher, G., & Kealy, A. (2020). Performance Analysis of GAGAN and Trimble RTX Satellite Based Augmentation Services in Respective to Equatorial Ionospheric Conditions. In International Global Navigation Satellite Systems (IGNSS) 2020 (p. 11). http://hdl.handle.net/20.500.12708/44030 ( reposiTUm)

Retscher, G., Li, Y., Kealy, A., & Gikas, V. (2020). The Need and Challenges for Ubiquitous Positioning, Navigation and Timing (PNT) Using Wi-Fi. In FIG Working Week 2020 (p. 18). http://hdl.handle.net/20.500.12708/44039 ( reposiTUm)

Goel, S., Gabela, J., Retscher, G., Toth, C. K., Masiero, A., & Kealy, A. (2020). UWB Cooperative Localization of Pedestrians along a Constrained Building Hallway. In International Global Navigation Satellite Systems (IGNSS) 2020 (p. 13). http://hdl.handle.net/20.500.12708/44029 ( reposiTUm)

Masiero, A., Perakis, H., Gabela, J., Toth, C., Gikas, V., Retscher, G., Goel, S., Kealy, A., Koppányi, Z., Błaszczak-Bak, W., Li, Y., & Grejner-Brzezinska, D. (2020). INDOOR NAVIGATION AND MAPPING: PERFORMANCE ANALYSIS OF UWB-BASED PLATFORM POSITIONING. In The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 549–555). https://doi.org/10.5194/isprs-archives-xliii-b1-2020-549-2020 ( reposiTUm)

Retscher, G., Kealy, A., Gikas, V., Gabela, J., Goel, S., Li, Y., Masiero, A., Toth, C. K., Perakis, H., Błaszczak-Bąk, W., Koppanyi, Z., & Grejner-Brzezinska, D. (2020). A Benchmarking Measurement Campaign to Support Ubiquitous Localization in GNSS Denied and Indoor Environments. In J. Freymueller & L. Sánchez (Eds.), Beyond 100: The Next Century in Geodesy  Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019 (pp. 123–128). Springer. https://doi.org/10.1007/1345_2020_102 ( reposiTUm)

Ranasinghe, P., Dammalage, T., & Retscher, G. (2019). A Low-cost Public Transport Tracking and Information System for Commuters in Sri Lanka. In G. Gartner & H. Huang (Eds.), LBS 2019 : Adjunct Proceedings of the 15th International Conference on Location-Based Services. Wien. https://doi.org/10.34726/lbs2019.25 ( reposiTUm)

Retscher, G., & Leb, A. (2019). Influence of the RSSI Scan Duration of Smartphones in Kinematic Wi-Fi Fingerprinting. In FIG Working Week 2019 (p. 15). http://hdl.handle.net/20.500.12708/43923 ( reposiTUm)

Wang, C., Dai, Y., El-Sheimy, N., Wen, C., Retscher, G., Kang, Z., & Lingua, A. (2019). Progress on ISPRS Benchmark on Multisensory Indoor Mapping and Positioning. In The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 1709–1713). ISPRS Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. https://doi.org/10.5194/isprs-archives-xlii-2-w13-1709-2019 ( reposiTUm)

Retscher, G., & Leb, A. (2019). Impact of Different Wi-Fi RSS Scan Durations on Kinematic Smartphone Positioning. In The 11th International Conference on Mobile Mapping Technology (MMT 2019) (p. 8). http://hdl.handle.net/20.500.12708/43930 ( reposiTUm)

Retscher, G., & Bekenova, A. (2019). Urban Wi-Fi Fingerprinting for Routing of Multi-modal Transport Users. In ION Pacific PNT. ION Pacific PNT Meeting, Honolulu, Hawaii, United States of America (the). Institute of Navigation. https://doi.org/10.33012/2019.16776 ( reposiTUm)

Retscher, G. (2019). Indoor Altitude Determination Using MEMS-based Sensors in Smartphones. In ION Pacific PNT. ION Pacific PNT Meeting, Honolulu, Hawaii, United States of America (the). Institute of Navigation. https://doi.org/10.33012/2019.16827 ( reposiTUm)

Retscher, G., Bekenova, A., Fazliu, A., Hallett, M., Harvey, L., & Janssen, J. (2019). Dynamic Wi-Fi Reference Point Recognition along Public Transport Routes. In G. Gartner & H. Huang (Eds.), LBS 2019 : Adjunct Proceedings of the 15th International Conference on Location-Based Services. Wien. https://doi.org/10.34726/lbs2019.26 ( reposiTUm)

Kealy, A., Retscher, G., Gabela, J., Li, Y., Goel, S., Toth, C. K., Masiero, A., Błaszczak-Bąk, W., Gikas, V., Perakis, H., Koppanyi, Z., & Grejner-Brzezinska, D. (2019). A Benchmarking Measurement Campaign in GNSS-denied/challenged Indoor/Outdoor and Transitional Environments. In FIG Working Week 2019 (p. 19). http://hdl.handle.net/20.500.12708/43922 ( reposiTUm)

Retscher, G., Hofer, H., & Obex, F. (2018). Localization and Guidance of Individuals or Groups in Multi-modal Transit Situations Using a Novel Cooperative Positioning Concept based on Differential Wi-Fi. In 7th Transport Research Arena TRA 2018 (p. 10). http://hdl.handle.net/20.500.12708/43835 ( reposiTUm)

Retscher, G., Kleine, J., & Whitemore, L. (2018). Trilateration Approaches for Indoor Wi-Fi Positioning. In International Symposium on GNSS 2018 (p. 7). http://hdl.handle.net/20.500.12708/43902 ( reposiTUm)

Retscher, G. (2018). Positioning in Location-based Services with an Emphasis on Indoor Environments. In Workshop on Positioning and Navigation (pp. 1–100). http://hdl.handle.net/20.500.12708/43863 ( reposiTUm)

Retscher, G., & Stangl, A. (2018). A Self-learning Fingerprinting Matching Algorithm for Indoor Wi-Fi Positioning. In ION PLANS 2018 Conference (p. 11). http://hdl.handle.net/20.500.12708/43836 ( reposiTUm)

Kealy, A., & Retscher, G. (2018). Robuts Positioning in Indoor Environments. In FIG Congress 2018. FIG Congress 2018, Istanbul, Turkey. http://hdl.handle.net/20.500.12708/43852 ( reposiTUm)

Goel, S., Gabela, J., Kealy, A., & Retscher, G. (2018). An Indoor-Outdoor Cooperative Localization Framework for UAVs. In IGNSS 2018 Conference (p. 15). http://hdl.handle.net/20.500.12708/43833 ( reposiTUm)

Kealy, A., Retscher, G., Li, Y., Gonzales, T., Goel, S., & Gabela, J. (2018). Robust Positioning Performance in Indoor Environments. In International Symposium on GNSS 2018 (p. 10). http://hdl.handle.net/20.500.12708/43901 ( reposiTUm)

Retscher, G., Li, Y., Williams, S., Kealy, A., Moran, B., Goel, S., & Gabela, J. (2018). Wi-Fi Positioning Using a Network Differential Approach for Real-time Calibration. In IGNSS 2018 Conference (p. 15). http://hdl.handle.net/20.500.12708/43834 ( reposiTUm)

Retscher, G., Li, Y., Kealy, A., Hofer, H., Gabela, J., Goel, S., Qureshi, O., Smith, E., & Bao, L. (2018). Real-time Wi-Fi RSS Variation Correction Using a Network Differential Positioning Approach. In 9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018 (pp. 1–4). http://hdl.handle.net/20.500.12708/43887 ( reposiTUm)

Gikas, V., Perakis, H., Kealy, A., Retscher, G., Antoniou, C., & Mpimis, T. (2017). Indoor Parking Facilities Management Based on RFID CoO Positioning in Combination with Wi-Fi and UWB. In FIG Working Week 2017 (p. 15). FIG. http://hdl.handle.net/20.500.12708/43756 ( reposiTUm)

Hofer, H., & Retscher, G. (2017). Combined Wi-Fi and Inertial Navigation with Smart Phones in Out- and Indoor Environments. In VTC2017-Spring Conference (p. 5). http://hdl.handle.net/20.500.12708/43750 ( reposiTUm)

Kealy, A., & Retscher, G. (2017). MEMS and Wireless Options in Cellular Phones for User Localization. In ION Pacific PNT (p. 13). http://hdl.handle.net/20.500.12708/43751 ( reposiTUm)

Retscher, G., Hofer, H., Kealy, A., Gikas, V., & Obex, F. (2017). Cooperative Localization in Indoor Environments Using Constrained Differential Wi-Fi and UWB Measurements. In Ion Gnss+ 2017 (p. 13). http://hdl.handle.net/20.500.12708/43755 ( reposiTUm)

Goel, S., Kealy, A., Lohani, B., & Retscher, G. (2017). A Cooperative Localization System for Unmanned Aerial Vehicles: Prototype Development and Analysis. In International Symposium on Mobile Mapping Technology (p. 7). http://hdl.handle.net/20.500.12708/43752 ( reposiTUm)

Retscher, G., Kealy, A., Gikas, V., Hofer, H., Ettlinger, A. F., & Obex, F. (2017). Cooperative Localization in Indoor Environments Using Constrained Differential Wi-Fi and UWB Measurements. In International Symposium on Mobile Mapping Technology (p. 2). http://hdl.handle.net/20.500.12708/43753 ( reposiTUm)

Hofer, H., & Retscher, G. (2017). INDOOR SMARTPHONE NAVIGATION USING A COMBINATION OF WI-FI AND INERTIAL NAVIGATION WITH INTELLIGENT CHECKPOINTS. In ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 327–334). https://doi.org/10.5194/isprs-annals-iv-2-w4-327-2017 ( reposiTUm)

Retscher, G. (2017). FUSION OF LOCATION FINGERPRINTING AND TRILATERATION BASED ON THEEXAMPLE OF DIFFERENTIAL WI-FI POSITIONING. In ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (pp. 377–384). https://doi.org/10.5194/isprs-annals-iv-2-w4-377-2017 ( reposiTUm)

Ettlinger, A. F., & Retscher, G. (2016). Use of Magnetic Fields in Combination with Wi-Fi and RFID for Indoor Positioning. In B. Ullmann (Ed.), VIENNA young SCIENTISTS SYMPOSIUM 2016 (pp. 84–85). Book-of-Abstracts.com. http://hdl.handle.net/20.500.12708/43613 ( reposiTUm)

Retscher, G., & Joksch, J. (2016). Comparison of Different Vector Distance Measure Calculation Variants for Indoor Location Fingerprinting. In 13th International Symposium on Location-Based Services LBS 2016 (p. 24). http://hdl.handle.net/20.500.12708/43617 ( reposiTUm)

Hofer, H., & Retscher, G. (2016). Combined Out- and Indoor Navigation with Smart Phones Using Intelligent Check Points. In 13th International Symposium on Location-Based Services LBS 2016 (p. 9). http://hdl.handle.net/20.500.12708/43618 ( reposiTUm)

Ozga, A., & Retscher, G. (2016). Static Positioning with the Aid of GPS and Cellular Network for Android OS Smartphones. In 13th International Symposium on Location-Based Services LBS 2016 (p. 30). http://hdl.handle.net/20.500.12708/43619 ( reposiTUm)

Ettlinger, A. F., & Retscher, G. (2016). Positioning Using Ambient Magnetic Fields in Combination with Wi-Fi and RFID. In 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016 (p. 8). http://hdl.handle.net/20.500.12708/43614 ( reposiTUm)

Retscher, G., & Joksch, J. (2016). Analysis of Nine Vector Distances for Fingerprinting in Multiple-SSID Wi-Fi Networks. In 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016 (p. 5). http://hdl.handle.net/20.500.12708/43615 ( reposiTUm)

Gikas, V., Retscher, G., Kealy, A., Zhang, K., Paffenholz, J.-A., Ruotsalainen, L., Perakis, H., & Santos, M. (2016). IAG SC 4.1 “Emerging Positioning Technologies and Applications” - Objectives and Structure for the Term 2015-19. In European Navigation Conference ENC 2016 (p. 3). http://hdl.handle.net/20.500.12708/43566 ( reposiTUm)

Gikas, V., Dimitratos, A., Perakis, H., Retscher, G., & Ettlinger, A. F. (2016). Full-scale Testing and Performance Evaluation of an Active RFID System for Positioning and Personal Mobility. In IEEE Xplore 2016 International Conference on Indoor Positioning and Indoor Navigation (IPIN) (p. 8). http://hdl.handle.net/20.500.12708/43621 ( reposiTUm)

Retscher, G., Li, Y., Kealy, A., Hofer, H., Gabela, J., Goel, S., Qureshi, O., Smith, E., & Bao, L. (2016). Real-time Wi-Fi RSS Variation Correction Using a Network Differential Positioning Approach. In 9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018 (pp. 1–4). http://hdl.handle.net/20.500.12708/43886 ( reposiTUm)

Retscher, G., & Hofer, H. (2016). Wi-Fi Location Fingerprinting Using an Intelligent Checkpoint Sequence. In 78th FIG Working Week 2016 (p. 16). http://hdl.handle.net/20.500.12708/43564 ( reposiTUm)

Retscher, G., & Tatschl, T. (2016). Differential Wi-Fi - A Novel Approach for Wi-Fi Positioning Using Lateration. In 78th FIG Working Week 2016 (p. 17). http://hdl.handle.net/20.500.12708/43565 ( reposiTUm)

Retscher, G., & Tatschl, T. (2016). Indoor Positioning Using Wi-Fi Lateration - Comparison of Two Common Range Conversion Models with Two Novel Differential Approaches. In 4th International Conference Ubiquitous Positioning Indoor Navigation and Location Based Service UPINLBS (p. 10). http://hdl.handle.net/20.500.12708/43616 ( reposiTUm)

Goel, S., Kealy, A., Retscher, G., & Lohani, B. (2016). Cooperative P2I Localization Using UWB and Wi-Fi. In IGNSS 2016 (p. 16). http://hdl.handle.net/20.500.12708/43629 ( reposiTUm)

Bai, Y. B., Norman, R., Zhao, Y., Tang, S., Wu, S., Wu, H., Retscher, G., & Zhang, K. (2015). A New Algorithm for Improving the Tracking and Positioning of Cell of Origin. In 2015 International Association of Institutes of Navigation World Congress (p. 6). IEEE Xplore. http://hdl.handle.net/20.500.12708/43492 ( reposiTUm)

Retscher, G., & Obex, F. (2015). An Appeal to Discuss Ethical Issues in Context with Cooperative User Localization. In IGNSS 2015 Conference (p. 13). http://hdl.handle.net/20.500.12708/43490 ( reposiTUm)

Gikas, V., & Retscher, G. (2015). An RFID-based Virtual Gates Concept as a Complementary Tool for Indoor Vehicle Localization. In 6th International Conference Indoor Positioning and Indoor Navigation IPIN (p. 2). http://hdl.handle.net/20.500.12708/43491 ( reposiTUm)

Kealy, A., Goel, S., Retscher, G., Gikas, V., Toth, C. K., Grejner-Brzezinska, D., & Lohani, B. (2015). Cooperative Localization of Unmanned Aerial Systems Using Low Cost GNSS and MEMS Inertial Sensors. In 9th International Symposium on Mobile Mapping Technology (p. 11). http://hdl.handle.net/20.500.12708/43520 ( reposiTUm)

Gikas, V., Antoniou, C., Retscher, G., Panagopoulos, A., Perakis, H., Kealy, A., Mpimis, T., Economopoulos, T., & Marousis, A. (2015). A Low-cost RFID/WiFi Positioning Solution for Parking Facilities Management. In 9th International Symposium on Mobile Mapping Technology (p. 7). http://hdl.handle.net/20.500.12708/43519 ( reposiTUm)

Retscher, G., & Obex, F. (2015). A User Assistance and Guidance Service for Multi-modal Public Transit Situations Based on Cooperative Positioning. In 9th International Symposium on Mobile Mapping Technology (p. 7). http://hdl.handle.net/20.500.12708/43518 ( reposiTUm)

Retscher, G., & Hofer, H. (2015). A Novel Approach for Wi-Fi Fingerprinting Using Logical Sequences of Intelligent Checkpoints. In IGNSS 2015 (p. 16). http://hdl.handle.net/20.500.12708/43489 ( reposiTUm)

Obex, F., & Retscher, G. (2014). Ethical and Political Responsibility in Location Based Services - The Need of Implementing Ethical Thinking in Our Research Field. In 11th International Symposium on Location-Based Services LBS 2014 (p. 14). http://hdl.handle.net/20.500.12708/43392 ( reposiTUm)

Heuböck, S., & Retscher, G. (2014). Agricultural Forest Applications and Boundary Surveys Using Low-cost High Sensitivity GPS (HS-GPS) Receivers. In XXV International FIG Congress (p. 15). http://hdl.handle.net/20.500.12708/43377 ( reposiTUm)

Kealy, A., Retscher, G., Toth, C. K., & Grejner-Brzezinska, D. (2014). Collaborative Positioning - Concepts and Approaches for More Robust Positioning. In XXV International FIG Congress (p. 15). http://hdl.handle.net/20.500.12708/43378 ( reposiTUm)

Toth, C. K., Grejner-Brzezinska, D., Kealy, A., & Retscher, G. (2014). Personal Navigation and Indoor Mapping: Performance Characterization of Kinect Sensor-based Trajectory Recovery. In XXV International FIG Congress (p. 12). http://hdl.handle.net/20.500.12708/43380 ( reposiTUm)

Retscher, G. (2014). The Fourth Layer in Collaborative Navigation - Going Underground. In XXV International FIG Congress (p. 15). http://hdl.handle.net/20.500.12708/43379 ( reposiTUm)

Bai, Y. B., Wu, S., Ren, Y., Ong, K., Retscher, G., Kealy, A., Tomko, M., Sanderson, M., Wu, H. R., & Zhang, K. (2014). A New Approach for Indoor Customer Tracking Based on a Single Wi-Fi Connection. In 5th International Conference on Indoor Positioning and Indoor Navigation IPIN (p. 7). http://hdl.handle.net/20.500.12708/43391 ( reposiTUm)

Niedermayr, S., Retscher, G., & Wieser, A. (2013). The Role of RFID in a Low-cost Localization System for Provision of a Complete Operational Picture on Regional Airports. In European Navigation Conference 2013 (p. 7). http://hdl.handle.net/20.500.12708/43193 ( reposiTUm)

Heuböck, S., & Retscher, G. (2013). Performance of Low-cost HS-GPS Under Forest Canopy. In European Navigation Conference (p. 3). http://hdl.handle.net/20.500.12708/43197 ( reposiTUm)

Kealy, A., Hasnur-Rabiain, A., Alam, N., Toth, C. K., Grejner-Brzezinska, D., Gikas, V., & Retscher, G. (2013). Cooperative Positioning Algorithms and Techniques for Land Mobile Applications. In 8th International Symposium on Mobile Mapping Technology (p. 6). http://hdl.handle.net/20.500.12708/43194 ( reposiTUm)

Retscher, G., Hecht, T., & Mok, E. (2013). Location Capabilities and Performance of Smartphones for LBS Navigation Applications. In 8th International Symposium on Mobile Mapping Technology (p. 6). http://hdl.handle.net/20.500.12708/43195 ( reposiTUm)

Retscher, G., Mok, E., & Hecht, T. (2013). Smartphone Altitude Determination Using Embedded Barometric Pressure Sensors. In 10th International Symposium on Location-Based Services LBS 2013 (p. 3). http://hdl.handle.net/20.500.12708/43208 ( reposiTUm)

Hasnur-Rabiain, A., Kealy, A., Alam, N., Dempster, A., Toth, C. K., Grejner-Brzezinska, D., Gikas, V., Danezis, C., & Retscher, G. (2013). Cooperative Positioning using GPS, Low-cost INS and Dedicated Short Range Communications. In ION Pacific PNT 2013 (p. 11). http://hdl.handle.net/20.500.12708/43207 ( reposiTUm)

Kealy, A., Retscher, G., Hasnur-Rabiain, A., Alam, N., Toth, C. K., Grejner-Brzezinska, D., Moore, T., Hill, C., Gikas, V., Hide, C., Danezis, C., Bonenberg, L., & Roberts, G. (2013). Collaborative Navigation Field Trials with Different Sensor Platforms. In 10th Workshop on Positioning, Navigation and Communication WPNC 2013 (p. 6). http://hdl.handle.net/20.500.12708/43196 ( reposiTUm)

Pradipta, D., & Retscher, G. (2013). Feasibility Study of the Possibilities to Reduce the Multipath Bias for Smartphone Positioning in Urban Environments. In IAG Scientific Assembly (p. 2). http://hdl.handle.net/20.500.12708/43199 ( reposiTUm)

Heuböck, S., & Retscher, G. (2013). Investigation of the Performance of Low-cost HS-GPS Under Different Kinds of Forest Canopy. In IAG Scientific Assembly (p. 2). http://hdl.handle.net/20.500.12708/43198 ( reposiTUm)

Verhagen, S., Grejner-Brzezinska, D., Retscher, G., Santos, M., Ding, X., Gao, Y., & Jin, S. (2012). Geodetic Sensor Systems and Sensor Networks: Positioning and Applications. In N. Sneeuw, P. Novák, M. Crespi, & F. Sansò (Eds.), International Association of Geodesy Symposia (pp. 47–51). Springer Verlag. https://doi.org/10.1007/978-3-642-22078-4_7 ( reposiTUm)

Kealy, A., Retscher, G., Alam, N., Hasnur-Rabiain, A., Toth, C. K., Grejner-Brzezinska, D., Moore, T., Hill, C., Gikas, V., Hide, C., Danezis, C., Bonenberg, L., & Roberts, G. (2012). Collaborative Navigation with Ground Vehicles and Personal Navigators. In IPIN 2012 (pp. 1–8). IEEE Explore. http://hdl.handle.net/20.500.12708/43025 ( reposiTUm)

Mok, E., Retscher, G., & Wen, C. (2012). Initial Test on the Use of GPS and Sensor Data of Modern Smartphones for Vehicle Tracking in Dense High Rise Environments. In UPINLBS 2012 (pp. 1–7). IEEE Explore. http://hdl.handle.net/20.500.12708/43022 ( reposiTUm)

Retscher, G. (2012). KROKOGUIDE - From Crowd Analysis to Crowd Control and Individual Guidance. In European Navigation Conference ENC 2012 (pp. 1–12). http://hdl.handle.net/20.500.12708/43026 ( reposiTUm)

Gunawan, M., Li, B., Gallagher, T., Dempster, A., & Retscher, G. (2012). A New Method to Generate and Maintain a WiFi Fingerprinting Database Automatically by Using RFID. In IPIN 2012 (pp. 1–6). IEEE Explore. http://hdl.handle.net/20.500.12708/43024 ( reposiTUm)

Retscher, G. (2012). Wi-Fi Positioning with Smartphones. In 9th International Symposium on Location-Based Services LBS 2012 (pp. 1–9). http://hdl.handle.net/20.500.12708/43027 ( reposiTUm)

Retscher, G., & Hecht, T. (2012). Investigation of Location Capabilities of four Different Smartphones for LBS Navigation Applications. In IPIN 2012 (pp. 1–6). IEEE Explore. http://hdl.handle.net/20.500.12708/43023 ( reposiTUm)

Kealy, A., Retscher, G., Grejner-Brzezinska, D., Gikas, V., & Roberts, G. (2011). Evaluating the Performance of MEMS based Inertial Navigation Sensors for Land Mobile Applications. In 7th International Symposium on Mobile Mapping Technology (p. 6). http://hdl.handle.net/20.500.12708/44132 ( reposiTUm)

Zhu, M., Retscher, G., & Zhang, K. (2011). Integrated Algorithms for RFID-based Multi-sensor Indoor/Outdoor Positioning Solutions. In 7th International Symposium on Mobile Mapping Technology (p. 7). http://hdl.handle.net/20.500.12708/44133 ( reposiTUm)

Doukas, I., & Retscher, G. (2011). The Contribution of Contemporary Sensors to the Management of Natural and Manmade Disasters - The Present and the Future. In Joint International Symposium on Deformation Monitoring (p. 11). http://hdl.handle.net/20.500.12708/44134 ( reposiTUm)

Kealy, A., Toth, C. K., Grejner-Brzezinska, D., Roberts, G., Retscher, G., & Gikas, V. (2011). A New Paradigm for Developing and Delivering Ubiquitous Positioning Capabilities. In FIG Working Week 2011 - Bridging the Gaps between Cultures (p. 15). http://hdl.handle.net/20.500.12708/42814 ( reposiTUm)

Xia, L., Wu, D., Mok, E., & Retscher, G. (2011). Adaptive Indoor Hybrid Positioning for LBS. In 8th International Symposium on Location-Based Services LBS 2011 (p. 15). http://hdl.handle.net/20.500.12708/42827 ( reposiTUm)

Mok, E., Retscher, G., Wang, D., & Xia, L. (2011). Use of Smartphones for Tracking and Trip Recording. In 8th International Symposium on Location-Based Services LBS 2011 (p. 16). http://hdl.handle.net/20.500.12708/42826 ( reposiTUm)

Doukas, I., & Retscher, G. (2011). Whereto with Earthquake Risk Management: The Resultant of Sensor-Web and Web-GIS Could Show the Way. In Papers presented at the 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011. 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011, Guimarães, EU. http://hdl.handle.net/20.500.12708/42815 ( reposiTUm)

Retscher, G., & Fu, Q. (2010). Continuous Indoor Navigation with RFID and INS. In IEEE/ION Position, Location and Navigation Symposium PLANS 2010 (p. 11). http://hdl.handle.net/20.500.12708/42633 ( reposiTUm)

Kealy, A., Roberts, G., & Retscher, G. (2010). Evaluating the Performance of Low Cost MEMS Inertial Sensors for Seamless Indoor/Outdoor Navigation. In IEEE/ION Position, Location and Navigation Symposium PLANS 2010 (p. 11). http://hdl.handle.net/20.500.12708/42634 ( reposiTUm)

Pongracz, S., & Retscher, G. (2010). Visualization of Location Fingerprints in a Positioning System based on RFID. In Junior Scientist Conference (pp. 131–132). http://hdl.handle.net/20.500.12708/42635 ( reposiTUm)

Retscher, G., & Fu, Q. (2009). An Intelligent Personal Navigator Integrating GNSS, RFID and INS for Continuous Position Determination. In 6th International Symposium on Mobile Mapping Technology (p. 8). http://hdl.handle.net/20.500.12708/42472 ( reposiTUm)

Retscher, G. (2009). Multi-sensor Fusion Using a Kalman Filter and Knowledge-based Systems. In ION GNSS 2009 Conference (p. 8). http://hdl.handle.net/20.500.12708/42473 ( reposiTUm)

Fu, Q., & Retscher, G. (2009). Integration of a RFID Time-based CoO Positioning with INS Using a Time Data Capture Tool for Verification. In ION GNSS 2009 Conference (p. 8). http://hdl.handle.net/20.500.12708/42475 ( reposiTUm)

Kealy, A., Duckham, M., Retscher, G., Roberts, G., & Winter, S. (2009). Location Information Taxonomy for Location Based Services. In 6th International Symposium on Mobile Mapping Technology (p. 8). http://hdl.handle.net/20.500.12708/42474 ( reposiTUm)

Kabashi, I., & Retscher, G. (2009). Guidance and Steering of Construction Machines in Tunnelling. In A. Grün & H. Kahmen (Eds.), Optical 3-D Measurement Techniques IX (pp. 171–178). 9th Conference on Optical 3-D Measurement Techniques, July 1-3, 2009, Vienna, Austria. http://hdl.handle.net/20.500.12708/42471 ( reposiTUm)

Zhu, M., Zhang, K., Cartwright, W., Retscher, G., & Fu, Q. (2009). Possibility studies of Integrated INS/RFID Positioning Methods for Personal Positioning Applications. In IGNSS 2009 Conference (p. 8). http://hdl.handle.net/20.500.12708/42476 ( reposiTUm)

Retscher, G., & Fu, Q. (2008). RFID Trilateration for Indoor and Outdoor Positioning. In Toulouse Space Show ´08 - European Navigation Conference ENC-GNSS 2008 (p. 10). http://hdl.handle.net/20.500.12708/42213 ( reposiTUm)

Retscher, G., & Fu, Q. (2008). GNSS, RFID and INS Integration for Pedestrian Navigation. In GPS/GNSS 2008 Conference (p. 10). http://hdl.handle.net/20.500.12708/42263 ( reposiTUm)

Retscher, G., & Fu, Q. (2008). Active RFID Fingerprinting for Indoor Positioning. In ION GNSS 2008 Conference (p. 9). http://hdl.handle.net/20.500.12708/42262 ( reposiTUm)

Fu, Q., & Retscher, G. (2008). Using RFID Technology in Pedestrian Navigation for Information Transmission and Data Communication Recording. In Junior Scientist Conference (pp. 255–256). http://hdl.handle.net/20.500.12708/42264 ( reposiTUm)

Mok, E., Retscher, G., & Xia, L. (2007). MRERA (Minimum Range Error Algorithm): RFID - GNSS Integration for Vehicle Navigation in Urban Canyons. In 5th International Symposium on Mobile Mapping Technology (p. 7). http://hdl.handle.net/20.500.12708/42089 ( reposiTUm)

Retscher, G. (2007). Ubiquitous Positioning Solutions for Pedestrian Navigation. In 5th International Symposium on Mobile Mapping Technology (pp. 250–256). http://hdl.handle.net/20.500.12708/42088 ( reposiTUm)

Zhu, M., Zhang, K., Wu, F., Cartwright, W., & Retscher, G. (2007). An Investigation of Pedestrian Positioning Algorithms Based on Integrated Lowcost INS; GPS and Magnetometer. In IGNSS 2007 Conference (p. 11). http://hdl.handle.net/20.500.12708/42139 ( reposiTUm)

Retscher, G. (2007). Selected systems for Indoor and Pedestrian Navigation. In IGNSS 2007 Conference (p. 11). http://hdl.handle.net/20.500.12708/42138 ( reposiTUm)

Retscher, G., & Fu, Q. (2007). Using Active RFID for Positioning in Navigation Systems. In 4th International Symposium on Location Based Services and Telecartography (p. 11). http://hdl.handle.net/20.500.12708/42137 ( reposiTUm)

Retscher, G., Mok, E., & Xia, L. (2007). UWB, RFID and GNSS Integration for Navigation and Tracking. In 4th International Symposium on Location Based Services and Telecartography (p. 12). http://hdl.handle.net/20.500.12708/42140 ( reposiTUm)

Retscher, G., & Fu, Q. (2007). Integration of RFID, GNSS and DR for Ubiquitous Positioning in Pedestrian Navigation. In ION GNSS 2007 Confernece, Institute of Navigation (Eds) (p. 10). http://hdl.handle.net/20.500.12708/42136 ( reposiTUm)

Retscher, G., Moser, B., Vredeveld, D., & Heberling, D. (2006). Performance and Accuracy Test of the WLAN Positioning System ipos. In Hannoversche Beiträge zur Nachrichtentechnik (pp. 7–15). Shaker Verlag. http://hdl.handle.net/20.500.12708/41977 ( reposiTUm)

Retscher, G., Zhang, K., Zhang, S., & Wang, Y. (2006). Positioning case studies using RFID and GNSS: Indoor and Outdoor. In G. Gartner (Ed.), IGNSS 2006 Conference (p. 9). http://hdl.handle.net/20.500.12708/41979 ( reposiTUm)

Retscher, G., & Thienelt, M. (2006). Test and Integration of Location Sensors for Position Determination in a Pedestrian Navigation System. In IAIN/GNSS 2006 Conference (p. 6). http://hdl.handle.net/20.500.12708/41980 ( reposiTUm)

Retscher, G. (2006). Location Determination in Indoor Environments for Pedestrian Navigation. In IEEE/ION PLANS 2006 Conference (p. 9). http://hdl.handle.net/20.500.12708/41978 ( reposiTUm)

Retscher, G., & Mok, E. (2006). Investigation and Testing of Location Systems Using WiFi in Indoor Environments. In IAIN/GNSS 2006 Conference (p. 6). http://hdl.handle.net/20.500.12708/41981 ( reposiTUm)

Retscher, G., & Thienelt, M. (2006). A Multi-sensor Personal Positioning System for Combined Indoor/Outdoor Environments. In H. Kahmen & A. Chrzanowski (Eds.), 3rd IAG Symposium on Geodesy for Geotechnical and Structural Engineering and 12th FIG Deformation Measurement Symposium (p. 8). http://hdl.handle.net/20.500.12708/41982 ( reposiTUm)

Gang-Jun, L., Zhang, K., Densley, L., Wu, F., & Retscher, G. (2006). High Fidelity 3D Urban Model-based Signal Performance Simulation of the Current and Future GNSS in Australia. In IGNSS 2007 Conference (pp. 230–239). http://hdl.handle.net/20.500.12708/42007 ( reposiTUm)

Retscher, G. (2005). An Intelligent Multi-sensor System for Pedestrian Navigation. In GNSS Hong Kong 2005 (p. 8). http://hdl.handle.net/20.500.12708/41909 ( reposiTUm)

Retscher, G., & Mitterbauer, U. (2005). Kinematic Trajectory Determination for Construction Machines. In A. Grün & H. Kahmen (Eds.), Proceedings Optical 3-D Measurement Techniques VII, Vol. II (pp. 376–382). http://hdl.handle.net/20.500.12708/41911 ( reposiTUm)

Retscher, G. (2005). A Knowledge-based Kalman Filter Approach for an Intelligent Pedestrian Navigation System. In ION GNSS 2005 Conference (p. 11). ION GNSS 2005 Conference. http://hdl.handle.net/20.500.12708/41907 ( reposiTUm)

Retscher, G., & Thienelt, M. (2005). Evaluation and Test of a Digital Compass Module Employed for Heading Determination in a Pedestrian Navigation System. In A. Grün & H. Kahmen (Eds.), Proceedings Optical 3-D Measurement Techniques VII, Vol. II (pp. 389–394). http://hdl.handle.net/20.500.12708/41913 ( reposiTUm)

Retscher, G. (2005). 3-D Position Determination in a Multi-storey Building Using a Pedestrian Navigation System. In G. Gartner (Ed.), Geowissenschaftliche Mitteilungen, Schriftenreihe der Studienrichtung Vermessungswesen und Geoinformation, TU Wien (pp. 81–86). http://hdl.handle.net/20.500.12708/41908 ( reposiTUm)

Retscher, G., & Kealy, A. (2005). Ubiquitous Positioning Technologies for Intelligent Navigation Systems. In Hannoversche Beiträge zur Nachrichtentechnik (pp. 99–108). Shaker Verlag. http://hdl.handle.net/20.500.12708/41910 ( reposiTUm)

Retscher, G. (2005). Indoor Positioning Technologies for Personal Navigation Systems. In A. Grün & H. Kahmen (Eds.), Proceedings Optical 3-D Measurment Techniques VII, Vol. II (pp. 383–388). http://hdl.handle.net/20.500.12708/41912 ( reposiTUm)

Retscher, G. (2002). Multi-Sensor Systems for Machine Guidance and Control. In XXII FIG International Conference. XXII International Congress FIG 2002, Washington DC, Austria. American Society for Photogrammetrie and Remote Sensing. http://hdl.handle.net/20.500.12708/41840 ( reposiTUm)

Gikas, V., Retscher, G., & Kealy, A. (2018). Collaborative Positioning for Urban Intelligent Transportation Systems (ITS) and Personal Mobility (PM): Challenges and Perspectives. In Mobility Patterns, Big Data and Transport Analytics (pp. 381–414). Elsevier. https://doi.org/10.1016/b978-0-12-812970-8.00015-4 ( reposiTUm)

Retscher, G., & Kealy, A. (2018). Navigation Based on Sensors in Smartphones. In Advances in Wireless Technologies and Telecommunication (pp. 368–396). IGI Global. https://doi.org/10.4018/978-1-5225-3528-7.ch009 ( reposiTUm)

Retscher, G., & Roth, F. (2017). Wi-Fi Fingerprinting with Reduced Signal Strength Observations from Long-Time Measurements. In G. Gartner & H. Huang (Eds.), Progress in Location-Based Services 2016 (pp. 3–25). Springer Verlag. https://doi.org/10.1007/978-3-319-47289-8_1 ( reposiTUm)

Retscher, G. (2016). Indoor Navigation. In E. W. Grafarend (Ed.), Encyclopedia of Geodesy (pp. 1–7). Springer Verlag. https://doi.org/10.1007/978-3-319-02370-0_9-1 ( reposiTUm)

Retscher, G., Reiterer, A., & Mentes, G. (2014). Advances of Engineering Geodesy and Artificial Intelligence in Monitoring of Movements and Deformations of Natural and Man-made Structures. In C. Rizos & P. Willis (Eds.), Earth on the Edge. Science for a Sustainable Planet (pp. 481–486). Series: International Association of Geodesy Symposia. http://hdl.handle.net/20.500.12708/28411 ( reposiTUm)

Retscher, G., Zhu, M., & Zhang, K. (2012). RFID Positioning. In R. Chen (Ed.), Ubiquitous Positioning and Mobile Location-Based Services in Smart Phones (pp. 69–95). IGI Global. http://hdl.handle.net/20.500.12708/27742 ( reposiTUm)

Retscher, G., Reiterer, A., & Mentes, G. (2012). Report of Sub-commission 4.2 “Applications of Geodesy in Engineering.” In S. C. Kenyon, M. C. Pacino, & U. J. Marti (Eds.), Geodesy for Planet Earth (pp. 719–724). Springer Verlag. https://doi.org/10.1007/978-3-642-20338-1_89 ( reposiTUm)

Retscher, G. (2012). An Intelligent Personal Navigator Integrating GNSS, RFID and INS. In S. C. Kenyon, M. C. Pacino, & U. J. Marti (Eds.), Geodesy for Planet Earth (pp. 949–955). Springer Verlag. https://doi.org/10.1007/978-3-642-20338-1_119 ( reposiTUm)

Verhagen, S., Retscher, G., Santos, M. C., Ding, X. L., Gao, Y., & Jin, S. G. (2012). Positioning and Applications for Planet Earth. In S. C. Kenyon, M. C. Pacino, & U. J. Marti (Eds.), Geodesy for Planet Earth (pp. 713–718). Springer Verlag. https://doi.org/10.1007/978-3-642-20338-1_88 ( reposiTUm)

Zhang, K., Liu, G.-J., Wu, F., Densley, L., & Retscher, G. (2008). An Investigation of the Signal Performance of the Current and Future GNSS in Typical Urban Canyons in Australia Using a High Fidelity 3D Urban Model. In G. Gartner & K. Rehrl (Eds.), Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography (pp. 407–420). Springer Verlag. http://hdl.handle.net/20.500.12708/26188 ( reposiTUm)

Zhang, K., Zhu, M., Retscher, G., Wu, F., & Cartwright, W. (2008). Three-Dimension Indoor Positioning Algorithms Using an Integrated RFID/INS System in Multi-storey Buildings. In G. Gartner & K. Rehrl (Eds.), Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography (pp. 373–386). Springer Verlag. http://hdl.handle.net/20.500.12708/26187 ( reposiTUm)

Fu, Q., & Retscher, G. (2008). Using RFID and INS for Indoor Positioning. In G. Gartner & K. Rehrl (Eds.), Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography (pp. 421–438). Springer Verlag. http://hdl.handle.net/20.500.12708/26186 ( reposiTUm)

Retscher, G. (2007). Multi-sensor Systems for Pedestrian Navigation and Guidance Services. In V. C. Tao & J. Li (Eds.), Advances in Mobile Mapping Technology, ISPRS Book Series, Vol. 4 (pp. 89–94). Taylor & Francis. http://hdl.handle.net/20.500.12708/25204 ( reposiTUm)

Retscher, G. (2007). Altitude Determination of Pedestrian in a Multi-storey Building. In G. Gartner, W. Cartwright, & M. P. Peterson (Eds.), Location Based Services and TeleCartography, Lecture Notes in Geoinformation and Carthography (pp. 119–130). Springer. http://hdl.handle.net/20.500.12708/25203 ( reposiTUm)

Retscher, G. (2006). Location Based Services und persönliche Navigation. In H. Kahmen (Ed.), Angewandte Geodäsie: Vermessungskunde (pp. 541–552). Walter de Gruyter. http://hdl.handle.net/20.500.12708/25178 ( reposiTUm)

Retscher, G. (2005). Allgegenwärtige Positionierungsmethoden für Intelligente Navigationssysteme. In Geowissenschaftliche Mitteilungen, Schriftenreihe der Studienrichtung Vermessungswesen und Geoinformation der TU Wien (pp. 103–109). Geowissenschaftliche Mitteilungen, Band 71. http://hdl.handle.net/20.500.12708/25177 ( reposiTUm)

Retscher, G. (2007). Mobile multi-sensor systems for personal navigation and location-based services: Vols. 81 : Veröffentlichung des Instituts für Geodäsie und Geophysik, Forschungsgruppe Ingenieurgeodäsie. Inst. für Geodäsie und Geophysik, Techn. Univ. Wien. https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:3-183 ( reposiTUm)

Retscher, G. (Ed.). (2002). Diskussion der Leistungsmerkmale von Systemen zur Positionsbestimmung mit Mobiltelefonen als Basis für Location Based Services (LBS) (Vol. 58). http://hdl.handle.net/20.500.12708/22194 ( reposiTUm)

Retscher, G. (1996). 3D-Gleiserfassung mit einem Multisensorsystem und linearen Filterverfahren: Vols. 44 : Veröffentlichung des Instituts für Landesvermessung und Ingenieurgeodäsie, Abteilung Ingenieurgeodäsie. Inst. für Landesvermessung u. Ingenieurgeodäsie, Abt. Ingenieurgeodäsie. https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:3-552 ( reposiTUm)

Perakis, H., Retscher, G., Gikas, V., & Masiero, A. (2025, April 9). UWB/Wi‐Fi RTT Integration for Personal Mobility Applications of CP User Groups [Conference Presentation]. ISPRS Geospatial Week 2025, Dubai, United Arab Emirates (the). ( reposiTUm)

Retscher, G. (2024, February 22). The Smartphone – Becoming the All-rounder in Surveying ?! [Presentation]. Scientific Colloquium in Honor of Prof. Harald Schuh: Recent Achievements and Future Perspectives in Geodesy (2024), Potsdam, Germany. ( reposiTUm)

Retscher, G. (2023, May 19). Assessment of a Dual Frequency Multi-GNSS Smartphone [Presentation]. Seminar on: Assessment of a Dual Frequency Multi-GNSS Smartphone (Guest Lecture) 2023, Florenz, Italy. ( reposiTUm)

Retscher, G., & Gabela Majic, J. (2022, 0 0). New Opportunities with PBeL (Problem Based e-learning) for the Erasmus + Capacity Building in Higher Education Project LBS2ITS [Conference Presentation]. XXIV ISPRS Congress “Imaging today, foreseeing tomorrow,” Nice, France. ( reposiTUm)

Retscher, G., Gabela Majic, J., & Kealy Allision. (2022, 0 0). Applications and Approaches to High Performance Positioning and Navigation [Conference Presentation]. XXIV ISPRS Congress “Imaging today, foreseeing tomorrow,” Nice, France. ( reposiTUm)

Retscher, G. (2021). Covid-19 Contact Tracing Apps - Is Bluetooth a Reliable Technique for Distance Estimation. GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czech Republic, Czechia. http://hdl.handle.net/20.500.12708/83948 ( reposiTUm)

Retscher, G. (2021). Introduction to the LBS2ITS Erasmus+ Project. GEOWeek at the Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka. http://hdl.handle.net/20.500.12708/83949 ( reposiTUm)

Retscher, G. (2021). Wi-Fi Positioning Techniques for Challenging Indoor, Transitional and Urban Environments. AUTeC - Asociazione Universitari di Topografia e Cartografia, Italy. http://hdl.handle.net/20.500.12708/83950 ( reposiTUm)

Retscher, G. (2021). Techniques and Systems for Wi-Fi Positioning. GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czechia. http://hdl.handle.net/20.500.12708/84009 ( reposiTUm)

Retscher, G. (2020). Indoor-Positionierung - Stand der Technik und aktuelle Forschung an der TU Wien. Intergeo 2020 Digital, Deutschland, Germany. http://hdl.handle.net/20.500.12708/83936 ( reposiTUm)

Retscher, G. (2020). Wi-Fi Positioning for Ubiquitous PNT in Challenging Urban, Transitional and Indoor Environments. Free seminar: How to make WiFi reliant apps work in challenging urban environments, Wollongong, Australia. http://hdl.handle.net/20.500.12708/83892 ( reposiTUm)

Retscher, G. (2020). Smartphone Positioning with Signals-of-Opportunity. International Global Navigation Satellite Systems (IGNSS) 2020, Sydney, Australia. http://hdl.handle.net/20.500.12708/83691 ( reposiTUm)

Retscher, G., Gikas, V., Perakis, H., Hofer, H., & Kealy, A. (2019). Evaluation of UWB and Wi-Fi Cooperative Localization Perform ance in Indoor Environments. 27th IUGG General Assembly, Montreal, Canada. http://hdl.handle.net/20.500.12708/83816 ( reposiTUm)

Retscher, G. (2019). Positioning with Signals-of-Opportunity in Challenging Transitional and Indoor Environments. Guest Lecture at the Faculty of Geomatics of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka. http://hdl.handle.net/20.500.12708/83811 ( reposiTUm)

Retscher, G. (2019). State-of-the-art, Challenges and Perspectives for Indoor PNT Applications. Conference on Researches, Results and Reviews in Geomatics (R3 in Geomatics), Naples, Italy. http://hdl.handle.net/20.500.12708/83866 ( reposiTUm)

Rajavarathan, J., Dammalage, T., & Retscher, G. (2019). Comparative Performance Analysis of GAGAN and Trimble RTX Satellite Based Augmentation Systems over Sri Lanka. 7th International Conference of Sabaragamuwa University of Sri Lanka on Frontier Technologies for a Sustainable Future, Belihuloya, Sri Lanka. http://hdl.handle.net/20.500.12708/83865 ( reposiTUm)

Retscher, G. (2019). Wi-Fi Positioning in Challenging Urban, Transitional and Indoor Environments. Guest Lecture at the Institute of Geodesy of the University of Warmia and Mazury, Olsztyn, Poland. http://hdl.handle.net/20.500.12708/83864 ( reposiTUm)

Retscher, G. (2019). Wi-Fi Positioning for Seamless and Ubiquitous PNT for Urban, Transitional and Indoor Environments. Guest Lecture at the Department of Geomatics of the Indian Institute of Technology Kanpur, Kanpur, India. http://hdl.handle.net/20.500.12708/83814 ( reposiTUm)

Retscher, G. (2019). Wi-Fi Positioning in Challenging Urban, Transitional and Indoor Environments. Guest Lecture at the GIS Cell of Motilal Nehru Institute of Technology (MNNIT), Allahabad, India. http://hdl.handle.net/20.500.12708/83813 ( reposiTUm)

Retscher, G. (2019). Wi-Fi Positioning for Urban, Transitional and Indoor Environments. Guest Lecture at the Faculty of Urban Planning and the Faculty of Transportation of Moratuwa University, Colombo, Sri Lanka. http://hdl.handle.net/20.500.12708/83812 ( reposiTUm)

Retscher, G. (2019). Urban and Indoor Wi-Fi Positioning for Routing of Public Transport Users. 1st Symposium on Location Based Services, Xiamen, China. http://hdl.handle.net/20.500.12708/83775 ( reposiTUm)

Retscher, G., & Kealy, A. (2019). Positioning with Signals-of-Opportunity in Indoor and Transitional Environments. 11th International Conference on Mobile Mapping Technology 2019, Shenzhen, China. http://hdl.handle.net/20.500.12708/83776 ( reposiTUm)

Retscher, G., Kealy, A., Gikas, V., Gabela, J., Goel, S., Li, Y., Masiero, A., Toth, C. K., Perakis, H., Błaszczak-Bąk, W., Koppanyi, Z., & Grejner-Brzezinska, D. (2019). A Benchmarking Measurement Campaign to Support Ubiquitous Cooperative Platform Localization in GNSS Denied and Indoor Environments. 27th IUGG General Assembly, Montreal, Canada. http://hdl.handle.net/20.500.12708/83815 ( reposiTUm)

Retscher, G. (2018). Differential Wi-Fi - A New Opportunity for Localization of Individuals and Groups of Smartphone App Users. Curtin Spatial Science Colloquium 2018, Perth, Australia. http://hdl.handle.net/20.500.12708/83664 ( reposiTUm)

Retscher, G. (2018). Cooperative Positioning of User Groups in Multi-modal Transit Situations Based on Differential Wi-Fi and Inertial Navigation. 5th International Conference Ubiquitous Positioning Indoor Navigation and Location Based Service UPINLBS, Wuhan, China. http://hdl.handle.net/20.500.12708/83663 ( reposiTUm)

Retscher, G. (2018). Indoor Positioning in Multi-modal Transit Situations based on Differential Wi-Fi and Inertial Navigation. IE Seminar at The University of Melbourne, Melbourne, Australia. http://hdl.handle.net/20.500.12708/83668 ( reposiTUm)

Retscher, G. (2017). Indoor-Positionierung: Stand der Technik und aktuelle Forschung. OVG Vorträge Wien, Wien, Austria. http://hdl.handle.net/20.500.12708/83630 ( reposiTUm)

Retscher, G. (2017). Localization Using Wi-Fi - Challenges and Perspectives. Indoor3D Workshop of the ISPRS Geospatial Week, Wuhan, China. http://hdl.handle.net/20.500.12708/83586 ( reposiTUm)

Retscher, G., Hofer, H., Kealy, A., Gikas, V., Ettlinger, A. F., & Obex, F. (2017). Constrained Differential Wi-Fi and UWB Measurements for Indoor Cooperative User Localization. IAG-IASPEI Joint Scientific Assembly, Kobe, Japan. http://hdl.handle.net/20.500.12708/83566 ( reposiTUm)

Retscher, G. (2017). Novel Technological Developments for Indoor Wi-Fi Positioning. Geospatial Forum, School of Science, RMIT University, Melbourne, Australia. http://hdl.handle.net/20.500.12708/83589 ( reposiTUm)

Retscher, G. (2017). Research in the Field of Indoor Localization at TU Wien. Guest Lecture at the School of Environment Science and Spatial Informatics of the Chinese University of Mining and Technologies (CUMT), Xuzhou, China. http://hdl.handle.net/20.500.12708/83588 ( reposiTUm)

Retscher, G. (2017). Research in the Field of Indoor Localization at TU Wien. Guest Lecture at the Institute of Computing Technology of the Chinese Academy of Sciences, Beijing, China. http://hdl.handle.net/20.500.12708/83587 ( reposiTUm)

Retscher, G., & Roth, F. (2016). Wi-Fi Fingerprinting with Reduced Signal Strength Observations from Long-time Measurements. 13th International Symposium on Location-Based Services LBS 2016, Wien, Austria. http://hdl.handle.net/20.500.12708/83467 ( reposiTUm)

Kealy, A., Gikas, V., & Retscher, G. (2016). Recent Developments on Multi-Sensor Systems within the IAG as a Driver for Robust Positioning and Navigation. IAG Commission 4 Symposium, Wroclaw, Poland. http://hdl.handle.net/20.500.12708/83466 ( reposiTUm)

Retscher, G. (2016). Research Activities on Pedestrian Navigation and Ubiquitous Positioning at TU Wien. Guest Lecture at the Department of Civil Engineering and Geomatics of Cyprus University of Technology, Limassol, Cyprus. http://hdl.handle.net/20.500.12708/83468 ( reposiTUm)

Retscher, G. (2016). Novel Indoor Localization Technologies Using Wireless Fidelity (Wi-Fi). LSGI Distinguished Lecture Series, Hong Kong, Hong Kong. http://hdl.handle.net/20.500.12708/83421 ( reposiTUm)

Retscher, G. (2016). Indoor Localization Technologies Using Wi-Fi Based on Fingerprinting and Trilateration and in Combination with RFID. Guest Lecture at the School of Information Science and Engineering of Xiamen University, China, Xiamen, China. http://hdl.handle.net/20.500.12708/83469 ( reposiTUm)

Retscher, G. (2016). Research Activities on Pedestrian Navigation at TU Wien. Guest Lecture at the Department of Civil Engineering of the University of Nottingham Ningbo, Ningbo, China. http://hdl.handle.net/20.500.12708/83485 ( reposiTUm)

Retscher, G. (2015). Overview of In-/Outdoor Positioning Methods using RFID. EMPARCO Workshop, Athen, Greece. http://hdl.handle.net/20.500.12708/83353 ( reposiTUm)

Retscher, G. (2015). Differential Wi-Fi - A New Approach for Wi-Fi Positioning Using Lateration. IUGG 2015 General Assembly, Prag, Czechia. http://hdl.handle.net/20.500.12708/83352 ( reposiTUm)

Retscher, G. (2014). Ist Collaborative Positioning eine geeignete Lösung bei GNSS Beeinträchtigungen? Symposium der Fa. Geodäsie Austria, St. Ulrich bei Steyr, Austria. http://hdl.handle.net/20.500.12708/83243 ( reposiTUm)

Kealy, A., Retscher, G., Alam, N., Hasnur-Rabiain, A., Toth, C. K., Grejner-Brzezinska, D., Moore, T., Hill, C., Gikas, V., Hide, C., Danezis, C., Bonenberg, L., & Roberts, G. (2012). Collaborative Navigation with Ground Vehicles and Personal Navigators. 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney, Non-EU. http://hdl.handle.net/20.500.12708/82954 ( reposiTUm)

Retscher, G., & Hecht, T. (2012). Investigation of Location Capabilities of four Different Smartphones for LBS Navigation Applications. 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney, Non-EU. http://hdl.handle.net/20.500.12708/82953 ( reposiTUm)

Mok, E., Retscher, G., & Wen, C. (2012). Initial Test on the Use of GPS and Sensor Data of Modern Smartphones for Vehicle Tracking in Dense High Rise Environments. 2nd International Conference on Ubiquitous Positioning, Indoor Navigation and Location-Based Service UPINLBS 2012, Helsinki, EU. http://hdl.handle.net/20.500.12708/82956 ( reposiTUm)

Gunawan, M., Li, B., Gallagher, T., Dempster, A., & Retscher, G. (2012). A New Method to Generate and Maintain a WiFi Fingerprinting Database Automatically by Using RFID. 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney, Non-EU. http://hdl.handle.net/20.500.12708/82955 ( reposiTUm)

Retscher, G. (2012). Smartphone Positioning and Navigation in LBS. Seminar at the UNSW Sydney, Sydney, Non-EU. http://hdl.handle.net/20.500.12708/82879 ( reposiTUm)

Retscher, G. (2012). Wi-Fi Positioning with Smartphones. 9th International Symposium on Location-Based Services LBS 2012, München, EU. http://hdl.handle.net/20.500.12708/82952 ( reposiTUm)

Retscher, G. (2012). Covid-19 Contact Tracing Apps - Is Bluetooth a Reliable Technique for Distance Estimation? GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czechia. http://hdl.handle.net/20.500.12708/84008 ( reposiTUm)

Retscher, G., Mentes, G., & Reiterer, A. (2011). Earth on the Edge - Applications of Geodesy in Engineering. IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne, Non-EU. http://hdl.handle.net/20.500.12708/82769 ( reposiTUm)

Grejner-Brzezinska, D., Retscher, G., & Toth, C. K. (2011). Application of Artificial Intelligence and Multi-sensor Systems in Navigation and Engineering Geodesy. IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne, Non-EU. http://hdl.handle.net/20.500.12708/82772 ( reposiTUm)

Peng, J., Zhu, M., Zhang, K., & Retscher, G. (2011). New Algorithms Based on Sigma Point Kalman Filter Technique for Multi-sensor Integrated RFID Indoor/Outdoor Positioning. 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011, Guimarães, EU. http://hdl.handle.net/20.500.12708/82770 ( reposiTUm)

Retscher, G., & Kealy, A. (2011). Indoor Navigation on the Edge - Report of IAG WG 4.1.2. IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne, Non-EU. http://hdl.handle.net/20.500.12708/82771 ( reposiTUm)

Retscher, G. (2009). Aktuelle Forschung im Bereich Indoor-Navigation an der TU Wien. Geodätisches Kolloquium, Innsbruck, Austria. http://hdl.handle.net/20.500.12708/82410 ( reposiTUm)

Retscher, G. (2009). Mobile Multisensorsysteme in der Persönlichen Navigation und für Location Based Services. Habilitationskolloquium, Wien, Austria. http://hdl.handle.net/20.500.12708/82411 ( reposiTUm)

Retscher, G. (2008). Research in the Field of Indoor and Pedestrian Navigation at the Vienna University of Technology. Seminar at the RMIT University Melbourne, Victoria, Australia, Melbourne, Victoria, Australia, Non-EU. http://hdl.handle.net/20.500.12708/82155 ( reposiTUm)

Retscher, G. (2007). Erstellung eines österreichischen Konzepts für die Optimierung der Vermessungsleistung der ÖBB-Dienstleistungs GmbH. Vortragsreihe im Rahmen eines wissenschaftlichen Projektes, Wien, Austria. http://hdl.handle.net/20.500.12708/82113 ( reposiTUm)

Retscher, G. (2007). Research in the Field of Indoor and Pedestrian Navigation at the Research Group Engineering Geodesy at the Vienna University of Technology. 24. IUGG General Assembly, Perugia, EU. http://hdl.handle.net/20.500.12708/81978 ( reposiTUm)

Retscher, G. (2007). Aktuelle Forschung im Bereich Fußgängernavigation in Gebäuden und im städtischen Umfeld an der TU Wien. Geodätisches Kolloquium am Departement Geomatik an der HafenCity Universität Hamburg, Hamburg, EU. http://hdl.handle.net/20.500.12708/81977 ( reposiTUm)

Retscher, G. (2006). Overview about Current Research at the Engineering Geodesy Research Group of the Vienna University of Technology. Seminar at the Insitute of Engineering Surveying and Space Geodesy of the Nottingham University, Nottingham, UK, Nottingham, UK, EU. http://hdl.handle.net/20.500.12708/81862 ( reposiTUm)

Retscher, G. (2006). Von Geodätisch Rechnen zu Location Based Services - Moderne Tätigkeitsfelder des Geodäten. 20-jähriges Treffen des Studienganges Vermessungswesen 1986 an der Technischen Universität Wien, Wien, Austria. http://hdl.handle.net/20.500.12708/81863 ( reposiTUm)

Retscher, G. (2006). NAVIO - An Intelligent Multi-sensor System for Pedestrian Navigation in Combined Outdoor/Indoor Environments. Seminar of the School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, South Korea, Non-EU. http://hdl.handle.net/20.500.12708/81864 ( reposiTUm)

Retscher, G. (2005). Das NAVIO Projekt. Vortragsreihe am Institut für Nachrichtentechnik und Hochfrequenztechnik der TU Wien, Vienna, Austria, Austria. http://hdl.handle.net/20.500.12708/81735 ( reposiTUm)

Retscher, G. (2005). Multisensorsysteme in der Navigation und für ortsbezogene Dienste. Bewerbungsvortrag für die Professur Positionierung und Navigation an der Universität Hannover, Hannover, Germany, Austria. http://hdl.handle.net/20.500.12708/81733 ( reposiTUm)

Retscher, G. (2005). Location Based Services (LBS) und persönliche Navigation. Vortragsreihe anlässlich des Besuches der Fachhochschule Bochum, Institut für Geodäsie und Geophysik, TU Wien, Austria. http://hdl.handle.net/20.500.12708/81734 ( reposiTUm)

Kabashi, I., & Retscher, G. (2005). High frequent simultaneous zenith angle observations using video theodolites for deformation monitoring. International Conference “Dynamic Planet 2005” (IAG), Cairns, Australia, Non-EU. http://hdl.handle.net/20.500.12708/81732 ( reposiTUm)

Retscher, G. (2004). Multisensorsysteme in der Navigation und für Location Based Services. Geodätisches Kolloquium an der Technischen Universität Berlin, Berlin, Germany, Austria. http://hdl.handle.net/20.500.12708/81578 ( reposiTUm)

Retscher, G. (2004). Multi-sensor Systems for Indoor and Pedestrian Navigation. Seminar of the Department of Geomatics, The University of Melbourne, Victoria, Australia, Austria. http://hdl.handle.net/20.500.12708/81579 ( reposiTUm)

Retscher, G. (2004). Indoor and Pedestrian Navigation (IAG WG 4.1.2). Workshop on Location-based Technologies, Services and Applications; European Commission, Information Society Technologies, Directorate D-Communication Networks, Security & Software. Applications, Unit D1 - Communication and Network Technologies, Bruessel, Belgium, Austria. http://hdl.handle.net/20.500.12708/81576 ( reposiTUm)

Retscher, G. (2004). The NAVIO Project at the Vienna University of Technology, Austria - A Pedestrian Navigation System for Combined Indoor and Outdoor Environments. Seminar of the Department of Civil and Environmental Engineering and Geodetic Science, The Ohio State University, Columbus, Ohio, USA, Austria. http://hdl.handle.net/20.500.12708/81577 ( reposiTUm)

Retscher, G. (2003). Mobile Navigationssysteme auf der Basis von Location Based Services (LBS). Universitätslehrgang Verkehrstelematik-Management, Donau-Universität Krems, Österreich, Austria. http://hdl.handle.net/20.500.12708/81533 ( reposiTUm)

Retscher, G. (2002). Konzepte mobiler Navigationssysteme auf der Basis von LBS (Location Based Services). GeoPo 2002 Workshop on Location-Based Services and Mobile Navigation, Podersdorf, Austria. http://hdl.handle.net/20.500.12708/81551 ( reposiTUm)

Retscher, G. (2002). Diskussion der Leistungsmerkmale von Systemen zur Positionsbestimmung mit Mobiltelefonen als Basis für Location Based Services (LBS). Symposium für Telekartographie, Wien, Austria. http://hdl.handle.net/20.500.12708/81552 ( reposiTUm)

Retscher, G. (2002). Performance Analysis of an Expensive and a Low-Cost Digital Compass. XXII International Congress FIG 2002, Washington DC, Austria. http://hdl.handle.net/20.500.12708/81553 ( reposiTUm)

Weigert, T., & Retscher, G. (2022). Positioning Performance Evaluation of a Dual Frequency Multi-GNSS Smartphone. Coordinates Media Pvt. Ltd.’. http://hdl.handle.net/20.500.12708/175659 ( reposiTUm)

Gabela Majic, J., Retscher, G., Gartner, G., Binn, A., Gikas, V., Spyropoulou, I., Gerike, R., Ratnayake, R., Buddhika Jayasinghe, A., Perera, L., Kalansooriya, P., Pradeep, R., Hewawasam, C., Dammalage, T., & Abeyratne, V. (2022). Overview Of The PBL In Geodesy, Geoinformatics And Transport Engineering Education. https://doi.org/10.34726/3808 ( reposiTUm)

Kealy, A., Retscher, G., Gabela, J., Li, Y., Goel, S., Toth, C. K., Masiero, A., Błaszczak-Bąk, W., Gikas, V., Perakis, H., Koppanyi, Z., & Grejner-Brzezinska, D. (2019). A Benchmarking Measurement Campaign in GNSS-denied/Challenged Indoor/Outdoor and Transitional Environments (July/August). http://hdl.handle.net/20.500.12708/39785 ( reposiTUm)

Gikas, V., Perakis, H., Kealy, A., Retscher, G., Antoniou, C., & Mpimis, T. (2017). Indoor Parking Facilities Management Based on RFID CoO Positioning in Combination with Wi-Fi and UWB (October). http://hdl.handle.net/20.500.12708/39323 ( reposiTUm)

Retscher, G. (2007). Mobile multi-sensor systems for personal navigation and location-based services [Professorial Dissertation, Technische Universität Wien]. reposiTUm. http://hdl.handle.net/20.500.12708/185724 ( reposiTUm)