Niezgoda, Agnieszka, and Ewa Markiewicz. “Tourism Product in National Parks – Effects of COVID-19 Pandemic”. Studies of the Industrial Geography Commission of the Polish Geographical Society 36, no. 2 (June 29, 2022): 177–189. Accessed May 6, 2024. https://prace-kgp.uken.krakow.pl/article/view/8822.