SZYMAŃSKA, Wioletta. Borders as barriers (based on the example of European post-Communist countries). Journal of Geography, Politics and Society, [S. l.], v. 6, n. 2, p. 7–12, 2016. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/JGPS/article/view/3702. Acesso em: 4 may. 2024.