Malkowski, Arkadiusz, Beata Bieszk-Stolorz, Dawid Dawidowicz, Wojciech Zbaraszewski, and Martin Balas. 2022. “Sustainable Tourism As a Factor in the Development of Protected Areas in the Pomerania Euroregion”. Economics and Environment 80 (1):189-216. https://doi.org/10.34659/eis.2022.80.1.442.