JAKUBOWSKI, Andrzej and SEIDLOVÁ, Alexandra. 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. Online. 4 August 2022. No. 57, pp. 125-139. [Accessed 26 April 2025]. DOI 10.12775/bgss-2022-0027.