Kostka, L. W., Lemmerer, H., & Emberger, G. (2024). Public transport responses to COVID-19 in Germany and Austria with a focus on Berlin and Vienna. In T. Shibayama & G. Emberger (Eds.), International Perspectives on Public Transport Responses to COVID-19 (pp. 221–233). Elsevier. https://doi.org/10.1016/B978-0-443-13295-7.00004-6