Jakubowski, Andrzej, and Alexandra Seidlová. 2022. “UNESCO Transboundary Biosphere Reserves As Laboratories of Cross-Border Cooperation for Sustainable Development of Border Areas. The Case of the Polish–Ukrainian Borderland”. Bulletin of Geography. Socio-Economic Series, no. 57 (August):125-39. https://doi.org/10.12775/bgss-2022-0027.