Sukiennik, Jakub, Sławomir Czetwertyński, Paula Przysada-Sukiennik, and Agnieszka Mroczek-Czetwertyńska. “Institutional Differences and Threats to International Tourists from the Perspective of New Institutional Economics”. Research Papers in Economics and Finance 8, no. 1 (June 26, 2024). Accessed July 3, 2024. https://journals.ue.poznan.pl/REF/article/view/914.