Wissenschaftliche Artikel

Chajda, I., & Länger, H. (2025). Algebraic structures formalizing the logic with unsharp implication and negation. LOGIC JOURNAL OF THE IGPL, 33(1), 36–48. https://doi.org/10.1093/jigpal/jzad023 ( reposiTUm)
Chajda, I., & Länger, H. (2025). Algebraic structures formalizing the logic of quantum mechanics incorporating time dimension. Studia Logica, 113(1), 163–181. https://doi.org/10.1007/s11225-024-10103-7 ( reposiTUm)
Chajda, I., & Länger, H. (2025). On algebras whose congruences have a class that is a subuniverse. MISKOLC MATHEMATICAL NOTES, 26(1), 151–162. https://doi.org/10.18514/MMN.2025.4526 ( reposiTUm)
Chajda, I., & Länger, H. (2025). Operators on complemented lattices. Soft Computing, 29(7), 3115–3123. https://doi.org/10.1007/s00500-025-10626-8 ( reposiTUm)
Chajda, I., M. Kolarik, & Länger, H. (2025). Special filters in bounded lattices. Mathematica Slovaca, 75(4), 717–732. https://doi.org/10.1515/ms-2025-0054 ( reposiTUm)
Chajda, I., & Länger, H. (2025). Properties and special filters of pseudocomplemented posets. Journal of Multiple-Valued Logic and Soft Computing, 44, 269–289. ( reposiTUm)
Chajda, I., Kolařík, M., & Länger, H. (2024). c-ideals in complemented posets. Mathematica Bohemica, 149(3), 305–316. https://doi.org/10.21136/MB.2023.0108-22 ( reposiTUm)
Chajda, I., & Länger, H. (2024). Algebraic structures formalizing the logic of effect algebras incorporating time dimension. Mathematica Slovaca, 74(6), 1353–1368. https://doi.org/10.1515/ms-2024-0098 ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2024). Representability of Kleene Posets and Kleene Lattices. Studia Logica, 112(6), 1281–1317. https://doi.org/10.1007/s11225-023-10080-3 ( reposiTUm)
Dorninger, D., & Länger, H. (2023). On ring-like event systems in quantum logic. Asian-European Journal of Mathematics, 16(8), Article 2350148. https://doi.org/10.1142/S1793557123501486 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Tense Logic Based on Finite Orthomodular Posets. International Journal of Theoretical Physics, 62, Article 82. https://doi.org/10.1007/s10773-023-05327-7 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Operator residuation in orthomodular posets of finite height. Fuzzy Sets and Systems, 467, Article 108589. https://doi.org/10.1016/j.fss.2023.108589 ( reposiTUm)
Chajda, I., Kolařík, M., & Länger, H. (2023). Orthomodular and Skew Orthomodular Posets. Symmetry, 15(4), Article 810. https://doi.org/10.3390/sym15040810 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Conditions forcing the existence of relative complements in lattices and posets. Mathematica Slovaca, 73(1), 15–24. https://doi.org/10.1515/ms-2023-0003 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Extensions and Congruences of Partial Lattices. Mathematica Slovaca, 73(2), 289–304. https://doi.org/10.1515/ms-2023-0024 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Tolerances on posets. MISKOLC MATHEMATICAL NOTES, 24(2), 725–736. https://doi.org/10.18514/MMN.2023.4033 ( reposiTUm)
Chajda, I., & Länger, H. (2023). Monotone and cone preserving mappings on posets. Mathematica Bohemica, 148, 197–210. https://doi.org/10.21136/MB.2022.0026-21 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Residuation in twist products and pseudo-Kleene posets. Mathematica Bohemica, 147(3), 369–383. https://doi.org/10.21136/MB.2021.0182-20 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Inexact residuation in effect algebras. Journal of Multiple-Valued Logic and Soft Computing, 38(1–2), 57–79. http://hdl.handle.net/20.500.12708/136564 ( reposiTUm)
Chajda, I., & Länger, H. (2022). The logic of orthomodular posets of finite height. Logic Journal of the IGPL, 30(1), 143–154. https://doi.org/10.1093/jigpal/jzaa067 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Sheffer operation in relational systems. Soft Computing, 26(1), 89–97. https://doi.org/10.1007/s00500-021-06466-x ( reposiTUm)
Chajda, I., & Länger, H. (2022). Logical and algebraic properties of generalized orthomodular posets. Mathematica Slovaca, 72(2), 275–286. https://doi.org/10.1515/ms-2022-0018 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Orthogonality and complementation in the lattice of subspaces of a finite vector space. Mathematica Bohemica, 147(2), 141–153. https://doi.org/10.21136/mb.2021.0042-20 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Semimodules over commutative semirings and modules over unitary commutative rings. Linear and Multilinear Algebra, 70(7), 1329–1344. https://doi.org/10.1080/03081087.2020.1760192 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Implication in finite posets with pseudocomplemented sections. Soft Computing, 26(13), 5945–5953. https://doi.org/10.1007/s00500-022-07052-5 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Kleene posets and pseudo-Kleene posets. Miskolc Mathematical Notes, 23(1), 155. https://doi.org/10.18514/mmn.2022.3475 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Semimodular λ-lattices. Journal of Multiple-Valued Logic and Soft Computing, 39(1), 79–96. http://hdl.handle.net/20.500.12708/80228 ( reposiTUm)
Länger, H., & Chajda, I. (2022). Compositions and decompositions of binary relations. Mathematics for Applications, 11(2), 107–117. https://doi.org/10.13164/ma.2022.08 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Join-semilattices whose principal filters are pseudocomplemented lattices. MISKOLC MATHEMATICAL NOTES, 23(2), 559–577. https://doi.org/10.18514/MMN.2022.3854 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Integration in semirings. Asian-European Journal of Mathematics, 15(12), 2250222-1-2250222–11. https://doi.org/10.1142/S1793557122502229 ( reposiTUm)
Chajda, I., Fazio, D., Länger, H., Ledda, A., & Paseka, J. (2022). Algebraic properties of paraorthomodular posets. Logic Journal of the Interest Group in Pure and Applied Logic (IGPL), 30(5), 840–869. https://doi.org/10.1093/jigpal/jzab024 ( reposiTUm)
Chajda, I., Emir, K., Fazio, D., Länger, H., Ledda, A., & Paseka, J. (2022). An algebraic analysis of implication in non-distributive logics. Journal of Logic and Computation, 33(1), 47–89. https://doi.org/10.1093/logcom/exac041 ( reposiTUm)
Chajda, I., & Länger, H. (2021). How to introduce the connective implication in orthomodular posets. Asian-European Journal of Mathematics, 14(04), 2150066. https://doi.org/10.1142/s1793557121500662 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Adjoint operations in twist-products of lattices. Symmetry, 13(2), 253. https://doi.org/10.3390/sym13020253 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Algebras describing pseudocomplemented, relatively pseudocomplemented and sectionally pseudocomplemented posets. Symmetry, 13(5), 753. https://doi.org/10.3390/sym13050753 ( reposiTUm)
Dorninger, D., & Länger, H. (2021). On ring-like structures of lattice-ordered numerical events. Asian-European Journal of Mathematics, 14(10), 2150186. https://doi.org/10.1142/s1793557121501862 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Consistent posets. Soft Computing, 25(15), 9765–9772. https://doi.org/10.1007/s00500-021-05906-y ( reposiTUm)
Chajda, I., & Länger, H. (2021). Residuation in finite posets. Mathematica Slovaca, 71(4), 807–820. https://doi.org/10.1515/ms-2021-0021 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Filters and congruences in sectionally pseudocomplemented lattices and posets. Soft Computing, 25(14), 8827–8837. https://doi.org/10.1007/s00500-021-05900-4 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Properties of implication in effect algebras. Mathematica Slovaca, 71(3), 523–534. https://doi.org/10.1515/ms-2021-0001 ( reposiTUm)
Chajda, I., Kolařík, M., & Länger, H. (2021). Extensions of posets with an antitone involution to residuated structures. Fuzzy Sets and Systems, 425, 169–175. https://doi.org/10.1016/j.fss.2021.02.008 ( reposiTUm)
Chajda, I., Kolařík, M., & Länger, H. (2021). Varieties corresponding to classes of complemented posets. Miskolc Mathematical Notes, 22(2), 611. https://doi.org/10.18514/mmn.2021.3218 ( reposiTUm)
Dorninger, D., & Länger, H. (2021). On Boolean posets of numerical events. Advances in Computational Intelligence, 1, Article 4. https://doi.org/10.1007/s43674-021-00004-w ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2021). Sectionally pseudocomplemented posets. Order, 38(3), 527–546. https://doi.org/10.1007/s11083-021-09555-6 ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2020). Algebraic aspects of relatively pseudocomplemented posets. Order, 37(1), 1–29. https://doi.org/10.1007/s11083-019-09488-1 ( reposiTUm)
Dorninger, D., Länger, H., & Maczynski, M. J. (2020). Boolean Properties and Bell-Like Inequalities of Numerical Events. Reports on Mathematical Physics, 85(1), 147–162. https://doi.org/10.1016/s0034-4877(20)30016-1 ( reposiTUm)
Chajda, I., & Länger, H. (2020). Left residuated lattices induced by lattices with a unary operation. Soft Computing, 24(2), 723–729. https://doi.org/10.1007/s00500-019-04461-x ( reposiTUm)
Chajda, I., Kühr, J., & Länger, H. (2020). Relatively residuated lattices and posets. Mathematica Slovaca, 70(2), 239–250. https://doi.org/10.1515/ms-2017-0347 ( reposiTUm)
Chajda, I., & Länger, H. (2020). Orthomodular lattices that are horizontal sums of Boolean algebras. Commentationes Mathematicae Universitatis Carolinae, 61(1), 11–20. https://doi.org/10.14712/1213-7243.2020.003 ( reposiTUm)
Chajda, I., Eigenthaler, G., & Länger, H. (2020). Directly decomposable ideals and congruence kernels of commutative semirings. Miskolc Mathematical Notes, 21(1), 113. https://doi.org/10.18514/mmn.2020.2819 ( reposiTUm)
Chajda, I., & Länger, H. (2020). Sublattices and $\Delta$-blocks of orthomodular posets. Journal of Logic and Computation, 30(7), 1401–1423. https://doi.org/10.1093/logcom/exaa037 ( reposiTUm)
Chajda, I., Halaš, R., & Länger, H. (2020). The logic induced by effect algebras. Soft Computing, 24(19), 14275–14286. https://doi.org/10.1007/s00500-020-05188-w ( reposiTUm)
Chajda, I., & Länger, H. (2020). Lattices of subspaces of vector spaces with orthogonality. Journal of Algebra and Its Applications, 19(03), 2050041. https://doi.org/10.1142/s0219498820500413 ( reposiTUm)
Chajda, I., & Länger, H. (2020). Residuation in lattice effect algebras. Fuzzy Sets and Systems, 397, 168–178. https://doi.org/10.1016/j.fss.2019.11.008 ( reposiTUm)
Dorninger, D., & Länger, H. (2019). Quantum logics defined by sets of numerical events. Reports on Mathematical Physics, 83(2), 243–251. https://doi.org/10.1016/s0034-4877(19)30041-2 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Residuation in modular lattices and posets. Asian-European Journal of Mathematics, 12(02), 1950092. https://doi.org/10.1142/s179355711950092x ( reposiTUm)
Chajda, I., Halaš, R., & Länger, H. (2019). Operations and structures derived from non-associative MV-algebras. Soft Computing, 23(12), 3935–3944. https://doi.org/10.1007/s00500-018-3309-4 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Residuated structures derived from commutative idempotent semirings. Discussiones Mathematicae General Algebra and Applications, 39(1), 23–33. https://doi.org/10.7151/dmgaa.1300 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Basic semirings. Mathematica Slovaca, 69(3), 533–540. https://doi.org/10.1515/ms-2017-0245 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Ideals and their complements in commutative semirings. Soft Computing, 23(14), 5385–5392. https://doi.org/10.1007/s00500-018-3493-2 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Commutative rings whose ideal lattices are complemented. Asian-European Journal of Mathematics, 12(03), 1950039. https://doi.org/10.1142/s1793557119500396 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Left residuated operators induced by posets with a unary operation. Soft Computing, 23, 11351–11356. https://doi.org/10.1007/s00500-019-04028-w ( reposiTUm)
Chajda, I., & Länger, H. (2019). The lattice of subspaces of a vector space over a finite field. Soft Computing, 23, 3261–3267. https://doi.org/10.1007/s00500-019-03866-y ( reposiTUm)
Chajda, I., & Länger, H. (2018). Relatively pseudocomplemented posets. Mathematica Bohemica, 143(1), 89–97. http://hdl.handle.net/20.500.12708/144932 ( reposiTUm)
Dorninger, D., & Länger, H. (2018). Quantum measurements generating structures of numerical events. Journal of Applied Mathematics and Physics, 06(05), 982–996. https://doi.org/10.4236/jamp.2018.65085 ( reposiTUm)
Dorninger, D., & Länger, H. (2018). Structural properties of algebras of S-probabilities. Mathematica Slovaca, 68(3), 485–490. https://doi.org/10.1515/ms-2017-0118 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Weakly orthomodular and dually weakly orthomodular posets. Asian-European Journal of Mathematics, 11(02), 1850093. https://doi.org/10.1142/s1793557118500936 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Residuated operators in complemented posets. Asian-European Journal of Mathematics, 11(06), 1850097. https://doi.org/10.1142/s1793557118500973 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Weakly orthomodular and dually weakly orthomodular lattices. Order, 35(3), 541–555. https://doi.org/10.1007/s11083-017-9448-x ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2018). Uniquely complemented posets. Order, 35(3), 421–431. https://doi.org/10.1007/s11083-017-9440-5 ( reposiTUm)
Chajda, I., & Länger, H. (2018). When does a generalized Boolean quasiring become a Boolean ring? Soft Computing, 22(20), 6877–6879. https://doi.org/10.1007/s00500-017-2983-y ( reposiTUm)
Chajda, I., & Länger, H. (2018). Residuation in non-associative MV-algebras. Mathematica Slovaca, 68(6), 1313–1320. https://doi.org/10.1515/ms-2017-0181 ( reposiTUm)
Chajda, I., Eigenthaler, G., & Länger, H. (2018). Ideals of direct products of rings. Asian-European Journal of Mathematics, 11(04), 1850094. https://doi.org/10.1142/s1793557118500948 ( reposiTUm)
Chajda, I., Länger, H., & Padmanabhan, R. (2018). Single identities forcing lattices to be Boolean. Mathematica Slovaca, 68(4), 713–716. https://doi.org/10.1515/ms-2017-0138 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Derivations in Lukasiewicz semirings. Miskolc Mathematical Notes, 19(2), 769–785. https://doi.org/10.18514/mmn.2018.2637 ( reposiTUm)
Chajda, I., Goldstern, M., & Länger, H. (2018). A note on homomorphisms between products of algebras. Algebra Universalis. https://doi.org/10.1007/s00012-018-0517-9 ( reposiTUm)
Chajda, I., & Länger, H. (2017). States on basic algebras. Mathematica Bohemica, 142(2), 197–210. https://doi.org/10.21136/mb.2016.0056-14 ( reposiTUm)
Chajda, I., & Länger, H. (2017). On a variety of commutative multiplicatively idempotent semirings. Semigroup Forum, 94(3), 610–617. https://doi.org/10.1007/s00233-016-9786-9 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Residuation in orthomodular lattices. Topological Algebra and Its Applications, 5(1), 1–5. https://doi.org/10.1515/taa-2017-0001 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Coupled right orthosemirings induced by orthomodular lattices. Order, 34(1), 1–7. https://doi.org/10.1007/s11083-015-9383-7 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Properties of non-associative MV-algebras. Mathematica Slovaca, 67(5), 1095–1104. https://doi.org/10.1515/ms-2017-0035 ( reposiTUm)
Chajda, I., & Länger, H. (2017). The variety of commutative additively and multiplicatively idempotent semirings. Semigroup Forum, 96(2), 409–415. https://doi.org/10.1007/s00233-017-9905-2 ( reposiTUm)
Chajda, I., & Länger, H. (2017). On the structure of pseudo-BCK algebras. Journal of Multiple-Valued Logic and Soft Computing, 28(2–3), 179–188. http://hdl.handle.net/20.500.12708/146284 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Orthomodular lattices can be converted into left residuated l-groupoids. Miskolc Mathematical Notes, 18(2), 685. https://doi.org/10.18514/mmn.2017.1730 ( reposiTUm)
Chajda, I., & Länger, H. (2017). On the structure of balanced near semirings. MISKOLC MATHEMATICAL NOTES, 18(2), 691. https://doi.org/10.18514/mmn.2017.2201 ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2017). The groupoid-based logic for lattice effect algebras. 2017 IEEE 47th International Symposium on Multiple-Valued Logic (ISMVL). https://doi.org/10.1109/ismvl.2017.15 ( reposiTUm)
Länger, H., & Chajda, I. (2017). Convex congruences. Soft Computing, 21, 5641–5645. https://doi.org/10.1007/s00500-016-2306-8 ( reposiTUm)
Chajda, I., & Länger, H. (2017). A Representation of Lattice Effect Algebras by Means of Right Near Semirings with Involution. International Journal of Theoretical Physics. https://doi.org/10.1007/s10773-016-3191-8 ( reposiTUm)
Länger, H., & Dorninger, D. (2016). On bounded posets arising from quantum mechanical measurements. International Journal of Theoretical Physics. https://doi.org/10.1007/s10773-016-3068-x ( reposiTUm)
Chajda, I., & Länger, H. (2016). A triple representation of lattice effect algebras. Mathematica Slovaca, 32(3), 1261–1266. https://doi.org/10.1515/ms-2016-0221 ( reposiTUm)
Chajda, I., & Länger, H. (2016). General coupled semirings of residuated lattices. Fuzzy Sets and Systems, 303, 128–135. https://doi.org/10.1016/j.fss.2015.12.009 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Groupoids corresponding to relational systems. MISKOLC MATHEMATICAL NOTES, 17(1), 111–118. https://doi.org/10.18514/mmn.2016.818 ( reposiTUm)
Chajda, I., & Länger, H. (2016). When does a semiring become a residuated lattice? Asian-European Journal of Mathematics, 09(04), 1650088. https://doi.org/10.1142/s1793557116500881 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Relational systems with involution. Asian-European Journal of Mathematics, 09(04), 1650087. https://doi.org/10.1142/s179355711650087x ( reposiTUm)
Chajda, I., & Länger, H. (2016). On congruences of weak lattices. Soft Computing, 20(12), 4767–4771. https://doi.org/10.1007/s00500-015-2022-9 ( reposiTUm)
Chajda, I., & Länger, H. (2016). An ordered structure of pseudo-BCI-algebras. Mathematica Bohemica, 141(1), 91–98. https://doi.org/10.21136/mb.2016.7 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Subdirectly irreducible commutative multiplicatively idempotent semirings. Algebra Universalis, 327–337. https://doi.org/10.1007/s00012-016-0403-2 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Near semirings and semirings with involution. Miskolc Mathematical Notes, 17(2), 801–810. https://doi.org/10.18514/MMN.2016 ( reposiTUm)
Chajda, I., Länger, H., & Svrcek, F. (2015). Multiplicatively idempotent semirings. Mathematica Bohemica, 140(1), 35–42. http://hdl.handle.net/20.500.12708/150625 ( reposiTUm)
Chajda, I., & Länger, H. (2015). Commutative basic algebras and coupled near semirings. Soft Computing, 19(5), 1129–1134. http://hdl.handle.net/20.500.12708/150612 ( reposiTUm)
Chajda, I., Länger, H., & Ševčik, P. (2015). An algebraic approach to binary relations. Asian-European Journal of Mathematics, 08(02), 1550017. https://doi.org/10.1142/s1793557115500175 ( reposiTUm)
Chajda, I., & Länger, H. (2015). A representation of basic algebras by coupled right near semirings. Acta Scientiarum Mathematicarum, 81(34), 361–374. https://doi.org/10.14232/actasm-014-307-z ( reposiTUm)
Dorninger, D., & Länger, H. (2014). A note on Boolean subsets of orthomodular posets. Italian Journal of Pure and Applied Mathematics, 32, 277–282. http://hdl.handle.net/20.500.12708/156818 ( reposiTUm)
Chajda, I., & Länger, H. (2014). Orthomodular posets can be organized as conditionally residuated structures. Acta Universitatis Palackianae Olomucensis, Facultas Rerum Naturalium, Mathematica, 53(2), 29–33. http://hdl.handle.net/20.500.12708/157623 ( reposiTUm)
Länger, H. (2014). A simple recursion for power sum polynomials. Elemente Der Mathematik, 69(2), 65–67. https://doi.org/10.4171/em/249 ( reposiTUm)
Chajda, I., & Länger, H. (2014). Tense operators on spaces of numerical events. International Journal of Theoretical Physics, 53, 3456–3464. http://hdl.handle.net/20.500.12708/156839 ( reposiTUm)
Dorninger, D., & Länger, H. (2014). Probability measurements characterizing the classicality of a physical system. Reports on Mathematical Physics, 73(1), 127–135. https://doi.org/10.1016/s0034-4877(14)60036-7 ( reposiTUm)
Chajda, I., & Länger, H. (2013). Weak lattices. Italian Journal of Pure and Applied Mathematics, 30, 125–140. http://hdl.handle.net/20.500.12708/155000 ( reposiTUm)
Chajda, I., Kolarik, M., & Länger, H. (2013). Algebras assigned to ternary relations. MISKOLC MATHEMATICAL NOTES, 14(3), 827–844. http://hdl.handle.net/20.500.12708/155800 ( reposiTUm)
Chajda, I., & Länger, H. (2013). Spaces of abstract events. International Journal of Theoretical Physics, 52(6), 1818–1824. http://hdl.handle.net/20.500.12708/154940 ( reposiTUm)
Chajda, I., & Länger, H. (2013). Groupoids assigned to relational systems. Mathematica Bohemica, 138(1), 15–23. http://hdl.handle.net/20.500.12708/154797 ( reposiTUm)
Dorninger, D., & Länger, H. (2013). Testing for classicality of a physical system. International Journal of Theoretical Physics, 52(4), 1141–1147. https://doi.org/10.1007/s10773-012-1429-7 ( reposiTUm)
Chajda, I., & Länger, H. (2012). A non-associative generalization of effect algebras. Soft Computing, 16(8), 1411–1414. https://doi.org/10.1007/s00500-012-0844-2 ( reposiTUm)
Chajda, I., & Länger, H. (2012). Ring-like algebras associated with symmetric difference. Miskolc Mathematical Notes, 13(2), 283–292. http://hdl.handle.net/20.500.12708/164352 ( reposiTUm)
Chajda, I., Krnavek, J., & Länger, H. (2012). Congruences on directoids. Acta Sci.Math. (Szeged), 78, 389–402. http://hdl.handle.net/20.500.12708/164303 ( reposiTUm)
Chajda, I., & Länger, H. (2012). Symmetric differences on posets with an antitone involution. Order, 29(1), 215–225. https://doi.org/10.1007/s11083-011-9209-1 ( reposiTUm)
Chajda, I., Kolařík, M., & Länger, H. (2011). Polynomial permutations on bounded commutative directoids with an antitone involution. Soft Computing, 15(1), 183–186. https://doi.org/10.1007/s00500-010-0544-8 ( reposiTUm)
Chajda, I., & Länger, H. (2010). Quotients and homomorphisms of relational systems. Acta Universitatis Palackianae Olomucensis, Facultas Rerum Naturalium, Mathematica, 49(2), 37–47. http://hdl.handle.net/20.500.12708/167464 ( reposiTUm)
Dorfer, G., Dorninger, D., & Länger, H. (2010). On the structure of numerical event spaces. KYBERNETIKA, 46(6), 971–981. http://hdl.handle.net/20.500.12708/167642 ( reposiTUm)
Halas, R., & Länger, H. (2010). The zerodivisor graph of a qoset. ORDER-A JOURNAL ON THE THEORY OF ORDERED SETS AND ITS APPLICATIONS, 27, 343–351. http://hdl.handle.net/20.500.12708/167215 ( reposiTUm)
Dorfer, G., Dorninger, D., & Länger, H. (2010). On algebras of multidimensional probabilities. Mathematica Slovaca, 60, 571–582. http://hdl.handle.net/20.500.12708/167192 ( reposiTUm)
Chajda, I., & Länger, H. (2009). Action algebras. Italian Journal of Pure and Applied Mathematics, 26, 71–78. http://hdl.handle.net/20.500.12708/166874 ( reposiTUm)
Chajda, I., & Länger, H. (2009). A Cayley theorem for algebras with binary and nullary operations. Acta Sci.Math. (Szeged), 75, 55–58. http://hdl.handle.net/20.500.12708/165631 ( reposiTUm)
Chajda, I., & Länger, H. (2009). A Cayley theorem for distributive lattices. Algebra Universalis, 60(3), 365–367. http://hdl.handle.net/20.500.12708/165450 ( reposiTUm)
Chajda, I., & Länger, H. (2009). Quantifiers on lattices with an antitone involution. Demonstratio Mathematica, 42(2), 241–246. http://hdl.handle.net/20.500.12708/165699 ( reposiTUm)
Chajda, I., Kolarik, M., & Länger, H. (2008). Characterizations of posets via weak states. Demonstratio Mathematica, 41(3), 491–496. http://hdl.handle.net/20.500.12708/168597 ( reposiTUm)
Chajda, I., Halas, R., & Länger, H. (2008). Congruence kernels of orthomodular implication algebras. Discrete Mathematics, 308, 4724–4733. http://hdl.handle.net/20.500.12708/170201 ( reposiTUm)
Chajda, I., & Länger, H. (2008). Bounded lattices with antitone involution the complemented elements of which form a sublattice. Journal of Algebra and Discrete Structures, 6(1), 13–22. http://hdl.handle.net/20.500.12708/170183 ( reposiTUm)
Chajda, I., & Länger, H. (2008). Minimal bounded lattices with an antitone involution the complemented elements of which do not form a sublattice. Discussiones Mathematicae General Algebra and Applications, 28(2), 251–259. http://hdl.handle.net/20.500.12708/171213 ( reposiTUm)
Chajda, I., Halas, R., & Länger, H. (2007). Congruence kernels of orthoimplication algebras. Acta Mathematica Universitatis Comenianae, 76(2), 231–240. http://hdl.handle.net/20.500.12708/168708 ( reposiTUm)
Dorninger, D., & Länger, H. (2007). Polynomial permutations on finite lattices related to cryptography. International Journal of Pure and Applied Mathematics, 40(3), 441–449. http://hdl.handle.net/20.500.12708/168715 ( reposiTUm)
Dorninger, D., & Länger, H. (2007). Term extensions of partial ring-like quantum logics. International Journal of Contemporary Mathematical Sciences, 2(21), 999–1008. http://hdl.handle.net/20.500.12708/168690 ( reposiTUm)
Chajda, I., & Länger, H. (2007). A common generalization of ortholattices and Boolean quiasirings. Demonstratio Mathematica, 40(4), 769–774. http://hdl.handle.net/20.500.12708/168832 ( reposiTUm)
Chajda, I., & Länger, H. (2007). Generalizations of implication algebras. Sitzungsberichte Und Anzeiger: Mathematisch-Naturwissenschaftliche Klasse, 216, 33–43. http://hdl.handle.net/20.500.12708/170259 ( reposiTUm)
Chajda, I., & Länger, H. (2006). SAI-lattices and ringoids. Demonstratio Mathematica, 39(3), 483–490. http://hdl.handle.net/20.500.12708/172015 ( reposiTUm)
Chajda, I., & Länger, H. (2005). Modifications of MV-algebras corresponding to strong ortholattices. Demonstratio Mathematica, 38(1), 1–6. http://hdl.handle.net/20.500.12708/171858 ( reposiTUm)
Dorninger, D., Länger, H., & Maczynski, M. (2005). On ring-like structures related to symmetric cryptosystems. Demonstratio Mathematica, 38(2), 265–276. http://hdl.handle.net/20.500.12708/171866 ( reposiTUm)
Länger, H., & Maczynski, M. (2005). A Mackey-like approach to ring-like structures used in quantum logics. Reports on Mathematical Physics, 56, 413–419. http://hdl.handle.net/20.500.12708/171977 ( reposiTUm)
Chajda, I., & Länger, H. (2004). Ring-like structures corresponding to MV-algebras via symmetric difference. Sitzungsberichte Und Anzeiger: Mathematisch-Naturwissenschaftliche Klasse, 213, 33–41. http://hdl.handle.net/20.500.12708/174570 ( reposiTUm)

Beiträge in Tagungsbänden

Chajda, I., Länger, H., & Paseka, J. (2022). Constructions of Kleene lattices. In 2022 IEEE 52nd International Symposium on Multiple-Valued Logic (ISMVL). IEEE Computer Society. https://doi.org/10.1109/ismvl52857.2022.00020 ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2021). Residuated operators and Dedekind-MacNeille completion. In D. Fazio, A. Ledda, & F. Paoli (Eds.), Algebraic Perspectives on Substructural Logics (pp. 57–72). Springer Nature Switzerland AG. https://doi.org/10.1007/978-3-030-52163-9_5 ( reposiTUm)
Chajda, I., & Länger, H. (2021). Implication in weakly and dually weakly orthomodular lattices. In D. Fazio, A. Ledda, & F. Paoli (Eds.), Algebraic Perspectives on Substructural Logics (pp. 41–56). Springer Nature Switzerland AG. https://doi.org/10.1007/978-3-030-52163-9_4 ( reposiTUm)
Chajda, I., & Länger, H. (2010). Genomorphisms of monounary algebras. In I. Chajda, G. Dorfer, G. Eigenthaler, R. Halas, J. Kühr, & W. B. Müller (Eds.), Contributions to General Algebra 19 (pp. 25–32). Verlag Johannes Heyn. http://hdl.handle.net/20.500.12708/40959 ( reposiTUm)
Dorninger, D., & Länger, H. (2009). On a characterization of physical systems by spaces of numerical events. In ARGESIM Report 35 (2009), Proceedings MATHMOD 09 Vienna (p. 7). ARGESIM / ASIM. http://hdl.handle.net/20.500.12708/40831 ( reposiTUm)
Chajda, I., & Länger, H. (2008). A characterization of horizontal sums of Boolean rings. In G. Dorfer, G. Eigenthaler, H. Kautschitsch, W. More, & W. B. Müller (Eds.), Contributions to General Algebra 18 (pp. 23–30). Verlag Johannes Heyn. http://hdl.handle.net/20.500.12708/40757 ( reposiTUm)
Chajda, I., & Länger, H. (2006). Hereditary generalized Boolean quasirings, MV-algebras and de Morgan algebras. In G. Dorfer, G. Eigenthaler, M. Goldstern, W. B. Müller, & R. Winkler (Eds.), Contributions to General Algebra 17 (pp. 31–40). Verlag Johannes Heyn. http://hdl.handle.net/20.500.12708/40611 ( reposiTUm)

Beiträge in Büchern

Chajda, I., Fazio, D., Länger, H., Ledda, A., & Paseka, J. (2024). Implication in sharply paraorthomodular and relatively paraorthomodular posets. In J. Malinowski & R. Palczewski (Eds.), Janusz Czelakowski on Logical Consequence (Vol. 27, pp. 419–446). Springer. https://doi.org/10.1007/978-3-031-44490-6 ( reposiTUm)

Bücher

Chajda, I., & Länger, H. (2011). Directoids. An Algebraic Approach to Ordered Sets. Heldermann Verlag. http://hdl.handle.net/20.500.12708/23350 ( reposiTUm)

Präsentationen

Länger, H. (2025). Power sum polynomials [Presentation]. Algebra Seminar of the Department of Algebra and Geometry of the Palacký University Olomouc, Czechia. ( reposiTUm)
Chajda, I., & Länger, H. (2025, February 9). Complements and relative complements in lattices [Conference Presentation]. AAA 106 - 106th Workshop on General Algebra, Olomouc, Czechia. http://hdl.handle.net/20.500.12708/213634 ( reposiTUm)
Cenker, V., Chajda, I., & Länger, H. (2025, September 11). Properties of the symmetric difference in lattices with complementation [Conference Presentation]. Summer School on General Algebra and Ordered Sets 2025, Blansko, Czechia. http://hdl.handle.net/20.500.12708/219504 ( reposiTUm)
Chajda, I., & Länger, H. (2024, September 12). On algebras whose congruences have a class that is a subuniverse [Conference Presentation]. Summer School on General Algebra and Ordered Sets 2024, Karolinka, Czechia. http://hdl.handle.net/20.500.12708/200683 ( reposiTUm)
Chajda, I., & Länger, H. (2024, June 1). A characterization of permutability of 2-uniform tolerances on posets [Conference Presentation]. 105. Arbeitstagung Allgemeine Algebra - AAA105 (2024), Prag, Czechia. http://hdl.handle.net/20.500.12708/198005 ( reposiTUm)
Chajda, I., & Länger, H. (2024, November 19). Implications in pseudocomplemented and Stone lattices [Presentation]. Algebra Seminar of the Department of Algebra and Geometry of the UP Olomouc, Prag, Czechia. http://hdl.handle.net/20.500.12708/204865 ( reposiTUm)
Chajda, I., & Länger, H. (2023, November 21). On algebras whose congruences have a class that is a subuniverse [Presentation]. Algebra Seminar of the Department of Algebra and Geometry of the Palacký University Olomouc 2023, Olomouc, Czechia. http://hdl.handle.net/20.500.12708/204975 ( reposiTUm)
Chajda, I., & Länger, H. (2023, September 4). Tolerances on posets [Conference Presentation]. Summer School on General Algebra and Ordered Sets 2023, Stará Lesná, Slovakia. http://hdl.handle.net/20.500.12708/189325 ( reposiTUm)
Chajda, I., & Länger, H. (2022). Filters and ideals in pseudocomplemented posets. Algebra Seminar of the Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czechia. http://hdl.handle.net/20.500.12708/123530 ( reposiTUm)
Länger, H., & Chajda, I. (2022, November 22). Integration in semirings [Presentation]. Algebra Seminar of the Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czechia. http://hdl.handle.net/20.500.12708/136280 ( reposiTUm)
Chajda, I., & Länger, H. (2022, August 29). Filters and congruences in sectionally pseudocomplemented lattices and posets [Conference Presentation]. Summer School on General Algebra and Ordered Sets 2022, Hotel Sorea Titris, Tatranská Lomnica, Vysoké Tatry, Slovakia. http://hdl.handle.net/20.500.12708/80504 ( reposiTUm)
Chajda, I., Eigenthaler, G., & Länger, H. (2021). Directly decomposable ideals and congruence kernels of commutative semirings. Workshop on General Algebra and Ordered Sets, Karolinka, Czechia. http://hdl.handle.net/20.500.12708/123422 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Residuation in lattice effect algebras. 57th Summer School on General Algebra and Ordered Sets, Karolinka, Czechia. http://hdl.handle.net/20.500.12708/122800 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Unsharp residuation in effect algebras. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/122844 ( reposiTUm)
Chajda, I., & Länger, H. (2019). Lattices of subspaces of vector spaces. 97th Workshop on General Algebra, Vienna, Austria. http://hdl.handle.net/20.500.12708/122722 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Residuated structures derived from semirings. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/122356 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Lattices of subspaces of a vector space over a field. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/122467 ( reposiTUm)
Kwuida, L., & Länger, H. (2018). A simple identity forcing a lattice to be Boolean. 56th Summer School on Algebra and Ordered Sets, Spindlermühle, Czechia. http://hdl.handle.net/20.500.12708/122415 ( reposiTUm)
Chajda, I., & Länger, H. (2018). Horizontal sums of Boolean algebras. 96th Workshop on General Algebra, Darmstadt, Germany. http://hdl.handle.net/20.500.12708/122372 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Residuated structures derived from semirings. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/122025 ( reposiTUm)
Dorninger, D., & Länger, H. (2017). Quantum logics characterized by the strucure of numerical events. 19th ÖMG Congress and Annual DMV Meeting, Salzburg, Austria. http://hdl.handle.net/20.500.12708/121983 ( reposiTUm)
Chajda, I., & Länger, H. (2017). On a variety of semirings. 19th ÖMG Congress and Annual DMV Meeting, Salzburg, Austria. http://hdl.handle.net/20.500.12708/121982 ( reposiTUm)
Chajda, I., Länger, H., & Paseka, J. (2017). Uniquely complemented posets. 55th Summer School on Algebra and Ordered Sets, Nový Smokovec, Slovakia. http://hdl.handle.net/20.500.12708/121984 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Residuation in orthomodular lattices. 93rd Workshop on General Algebra, Bern, Switzerland. http://hdl.handle.net/20.500.12708/121840 ( reposiTUm)
Chajda, I., & Länger, H. (2017). Non-associative MV-algebras. 94th Workshop on General Algebra, Novi Sad, Serbia. http://hdl.handle.net/20.500.12708/121867 ( reposiTUm)
Chajda, I., & Länger, H. (2016). General coupled semirings and residuated lattices. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/121473 ( reposiTUm)
Chajda, I., & Länger, H. (2016). A representation of lattice effect algebras by means of right near semirings with involution. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/121576 ( reposiTUm)
Chajda, I., & Länger, H. (2016). General coupled semirings of residuated lattices. Algebra Seminar, E104, TU Wien, Austria. http://hdl.handle.net/20.500.12708/121436 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Relatively pseudocomplemented posets. 92th Workshop on General Algebra, Prag, Czechia. http://hdl.handle.net/20.500.12708/121488 ( reposiTUm)
Chajda, I., & Länger, H. (2016). Convex congruences. 54th Summer School on General Algebra and Ordered Sets, Trojanovice, Czechia. http://hdl.handle.net/20.500.12708/121513 ( reposiTUm)
Chajda, I., & Länger, H. (2015). States on basic algebras. 89th Workshop on General Algebra, Dresden, Germany. http://hdl.handle.net/20.500.12708/121086 ( reposiTUm)
Chajda, I., & Länger, H. (2015). Subdirectly irreducible commutative multiplicatively idempotent semirings. 90th Workshop on General Algebra, Novi Sad, Serbia. http://hdl.handle.net/20.500.12708/121114 ( reposiTUm)
Dorninger, D., & Länger, H. (2014). On algebras of multidimensional probabilities related to quantum logic. 87th Workshop on General Algebra, Linz, Austria. http://hdl.handle.net/20.500.12708/120133 ( reposiTUm)
Chajda, I., & Länger, H. (2014). Multiplicatively idempotent semigroups. 87th Workshop on General Algebra, Linz, Austria. http://hdl.handle.net/20.500.12708/120132 ( reposiTUm)
Chajda, I., & Länger, H. (2014). A non-associative generalization of effect algebras. Slowakische Akademie der Wissenschaften, Bratislava, Slovakia. http://hdl.handle.net/20.500.12708/120727 ( reposiTUm)
Chajda, I., & Länger, H. (2014). A correspondence between binary operations and binary relations. 88th Workshop on General Algebra, Warsaw, Poland. http://hdl.handle.net/20.500.12708/120775 ( reposiTUm)
Länger, H. (2013). A simple recursion for polynomials of sums of powers. Universität Olomouc, Olomouc, EU. http://hdl.handle.net/20.500.12708/120328 ( reposiTUm)
Länger, H. (2013). A simple recursion for polynomials of sums of powers. 18th ÖMG Congress and Annual DMV Meeting, Universität Innsbruck, Austria. http://hdl.handle.net/20.500.12708/120387 ( reposiTUm)
Dorninger, D., & Länger, H. (2013). Testing for classicality of a physical system. 18th ÖMG Congress and Annual DMV Meeting, Universität Innsbruck, Austria. http://hdl.handle.net/20.500.12708/120388 ( reposiTUm)
Chajda, I., & Länger, H. (2013). A non-associative generalization of effect algebras. 68th Workshop on General Algebra, Dresden, Germany. http://hdl.handle.net/20.500.12708/120335 ( reposiTUm)
Dorfer, G., Dorninger, D., & Länger, H. (2011). On spaces of multidimensional probabilities. 81st Workshop on General Algebra, Salzburg, Austria, Austria. http://hdl.handle.net/20.500.12708/119684 ( reposiTUm)
Chajda, I., & Länger, H. (2011). Symmetric differences on posets with an antitone involution. ÖMG-Tagung-CSASC 2011, Krems, Austria. http://hdl.handle.net/20.500.12708/119743 ( reposiTUm)
Halas, R., & Länger, H. (2011). The zerodivisor graph of a poset. 81st Workshop on General Algebra, Salzburg, Austria, Austria. http://hdl.handle.net/20.500.12708/119686 ( reposiTUm)
Chajda, I., & Länger, H. (2010). A Cayley theorem for algebras with binary and nullary operations. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/119338 ( reposiTUm)
Chajda, I., & Länger, H. (2010). Symmetric differences on posets with an antitone involution. 79th Workshop on General Algebra, Olomouc, EU. http://hdl.handle.net/20.500.12708/119330 ( reposiTUm)
Dorninger, D., & Länger, H. (2009). On algebras of numerical events. 17th ÖMG Congress / Annual DMV Conference, Graz, Austria. http://hdl.handle.net/20.500.12708/119032 ( reposiTUm)
Chajda, I., & Länger, H. (2009). Weak lattices. 17th ÖMG Congress / Annual DMV Conference, Graz, Austria. http://hdl.handle.net/20.500.12708/119033 ( reposiTUm)
Dorninger, D., & Länger, H. (2009). On a characterization of physical systems by spaces of numerical events. 6th Vienna Conference on Mathematical Modelling, Wien, Austria. http://hdl.handle.net/20.500.12708/118951 ( reposiTUm)
Chajda, I., & Länger, H. (2009). Weak lattices. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/119079 ( reposiTUm)
Chajda, I., & Länger, H. (2008). A Cayley Theorem for algebras with binary and nullary operations. 76. Arbeitstagung Allgemeine Algebra (AAA76), Linz, Austria. http://hdl.handle.net/20.500.12708/118579 ( reposiTUm)
Chajda, I., & Länger, H. (2008). A Cayley Theorem for algebras with binary and nullary operations. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/118765 ( reposiTUm)
Dorninger, D., & Länger, H. (2007). Polynomial permutations on finite lattices with an antitone involution. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/118246 ( reposiTUm)
Chajda, I., & Länger, H. (2007). A characterization of horizontal sums of Boolean rings. 73. Arbeitstagung Allgemeine Algebra, Klagenfurt, Austria, Austria. http://hdl.handle.net/20.500.12708/118171 ( reposiTUm)
Chajda, I., Halas, R., & Länger, H. (2007). Congruence kernels of orthoimplication algebras. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/118173 ( reposiTUm)
Dorninger, D., & Länger, H. (2007). On characteristic polynomials of vertex- and edge-weighted molecular graphs. 6th International Congress on Industrial and Applied Mathematics (ICIAM07), Zürich, Non-EU. http://hdl.handle.net/20.500.12708/118195 ( reposiTUm)
Chajda, I., & Länger, H. (2006). Bounded lattices with antitone involution the complemented elements of which form a sublattice. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/117969 ( reposiTUm)
Länger, H. (2005). Permutationspolynome auf beschränkten Verbänden mit einer antitonen Involution. Institut für Diskrete Mathematik und Geometrie, Wien, Austria, Austria. http://hdl.handle.net/20.500.12708/117196 ( reposiTUm)
Dorninger, D., & Länger, H. (2005). Polynomial permutations on bounded lattices with antitone involution. 70th Workshop on General Algebra, Vienna, Austria, Austria. http://hdl.handle.net/20.500.12708/117438 ( reposiTUm)
Chajda, I., & Länger, H. (2005). Hereditary generalized Boolean quasirings, MV-algebras and de Morgan algebras. 70th Workshop on General Algebra, Vienna, Austria, Austria. http://hdl.handle.net/20.500.12708/117440 ( reposiTUm)
Chajda, I., Halas, R., & Länger, H. (2005). Simple axioms for orthomodular implication algebras. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/117468 ( reposiTUm)
Länger, H. (2005). An application of algebra to genetics. 16th International Congress of the Austrian Mathematical Society (ÖMG), Klagenfurt, Austria, Austria. http://hdl.handle.net/20.500.12708/117488 ( reposiTUm)
Länger, H., & Maczynski, M. (2005). A Mackey-like approach to ring-like structures used in quantum logics. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/117525 ( reposiTUm)
Länger, H. (2005). An application of algebra to genetics. Faculty of Mathematics and Information Science of the Warsaw University of Technology, Warsaw, Poland, Austria. http://hdl.handle.net/20.500.12708/117409 ( reposiTUm)
Länger, H. (2005). An application of algebra to genetics. Department of Mathematics of the Faculty of Electrical Engineering and Information Technology of the University of Technology Bratislava, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/117442 ( reposiTUm)
Länger, H. (2004). An interesting application of algebra to genetics. Department of Algebra and Geometry of the Palacký University Olomouc, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/116859 ( reposiTUm)
Länger, H. (2004). Congruence uniformity of single algebras. Faculty of Mathematics and Information Science of the Warsaw University of Technology, Warsaw, Poland, Austria. http://hdl.handle.net/20.500.12708/116722 ( reposiTUm)
Länger, H. (2003). Determined congruence classes. 66th Workshop on General Algebra, Klagenfurt, Austria, Austria. http://hdl.handle.net/20.500.12708/116260 ( reposiTUm)
Länger, H. (2003). Congruence classes in universal algebra. Department of Mathematics of the Faculty of Electrical Engineering and Information Technology of the University of Technology Bratislava, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/116253 ( reposiTUm)
Länger, H. (2003). Congruence classes in universal algebra. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/116254 ( reposiTUm)
Länger, H. (2003). On ring-like structures related to axiomatic quantum mechanics. Institut für Algebra und Computermathematik, Wien, Austria, Austria. http://hdl.handle.net/20.500.12708/116322 ( reposiTUm)
Länger, H. (2003). Congruence classes in universal algebra. Faculty of Mathematics and Information Science of the Warsaw University of Technology, Warsaw, Poland, Austria. http://hdl.handle.net/20.500.12708/116241 ( reposiTUm)
Länger, H. (2002). Hypersubstitutions in orthomodular lattices. Faculty of Mathematics and Information Science of the Warsaw University of Technology, Warsaw, Poland, Austria. http://hdl.handle.net/20.500.12708/115862 ( reposiTUm)
Länger, H. (2002). Ring-like structures with unique symmetric difference related to quantum logic. Quantum Structures 2002, Wien, Austria, Austria. http://hdl.handle.net/20.500.12708/115970 ( reposiTUm)
Länger, H. (2002). Normal varieties of monounary algebras. 64th Workshop on General Algebra, Olomouc, Czech Republic, Austria. http://hdl.handle.net/20.500.12708/115863 ( reposiTUm)
Länger, H. (2002). Quantum implication. Mathematical Institute of the Slovak Academy of Sciences, Bratislava, Slovak Republic, Austria. http://hdl.handle.net/20.500.12708/115861 ( reposiTUm)