Parzych, Krzysztof, Rafał Gotowski, and Wiktoria Karczewska. “Tourist Arrivals from Germany to Poland in the Years 2000-2018”. Pedagogy and Psychology of Sport 6, no. 1 (February 28, 2020): 93–103. Accessed July 28, 2024. https://apcz.umk.pl/PPS/article/view/PPS.2020.06.01.008.