Krengel, Fabian, Christian Bernhofer, Sergey Chalov, Vasily Efimov, Ludmila Efimova, Liudmila Gorbachova, Michal Habel, et al. “Challenges for Transboundary River Management in Eastern Europe – Three Case Studies”. DIE ERDE – Journal of the Geographical Society of Berlin 149, no. 2-3 (September 27, 2018): 157–172. Accessed December 4, 2024. https://die-erde.de/index.php/die-erde/article/view/389.