NIEZGODA, A.; MARKIEWICZ, E. The effects of the COVID-19 pandemic in National Parks – diagnosis and forecast of sustainable tourism. Studia Periegetica, [S. l.], v. 33, n. 1, p. 9–24, 2021. DOI: 10.5604/01.3001.0014.8727. Disponível em: https://journals.wsb.poznan.pl/index.php/sp/article/view/305. Acesso em: 28 kwi. 2024.