Krengel, F., Bernhofer, C., Chalov, S., Efimov, V., Efimova, L., Gorbachova, L., … Karthe, D. (2018). Challenges for transboundary river management in Eastern Europe – three case studies. DIE ERDE – Journal of the Geographical Society of Berlin, 149(2-3), 157–172. Retrieved from https://die-erde.de/index.php/die-erde/article/view/389