Malkowski, Arkadiusz, Beata Bieszk-Stolorz, Dawid Dawidowicz, Wojciech Zbaraszewski, and Martin Balas. “Sustainable Tourism As a Factor in the Development of Protected Areas in the Pomerania Euroregion”. Economics and Environment 80, no. 1 (April 20, 2022): 189–216. Accessed April 26, 2024. https://ekonomiaisrodowisko.pl/journal/article/view/442.