Studzieniecki , Tomasz, and Tadeusz Palmowski. “Renewable Energy Sources in Transnational Cooperation in the Baltic Sea Region”. Bulletin of Geography. Socio-economic Series, no. 56 (April 8, 2022): 7–21. Accessed January 27, 2023. https://apcz.umk.pl/BGSS/article/view/36789.