Malkowska A, Malkowski A, Tokarz-Kocik A. The impact of the maritime border on the development of Po- land’s border areas in terms of expenses of foreigners and the COVID-19 pandemic. qg [Internet]. 2023 Dec. 20 [cited 2024 May 17];42(4):157-68. Available from: https://pressto.amu.edu.pl/index.php/qg/article/view/41005