Bukowski, Patryk. “Frontex Activities on the Western Balkan Route During the Migrant Crisis (2015-…)”. Polish Review of International and European Law 8, no. 2 (January 30, 2020): 97-111. Accessed September 25, 2020. https://czasopisma.uksw.edu.pl/index.php/priel/article/view/5689.