Zdrojewski, Eugeniusz, and Aneta Kisiel. “The Phenomenon of Foreign Migrations and Selected Aspects of the Development of Human Capital”. Olsztyn Economic Journal 12, no. 4 (December 11, 2017): 345–355. Accessed April 26, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/2826.