BOGACKA, Emilia. Cross-Border Cooperation on Security in Europe. Quaestiones Geographicae, [S. l.], v. 29, n. 4, p. 41–51, 2010. DOI: 10.2478/v10117-010-0030-5. Disponível em: https://pressto.amu.edu.pl/index.php/qg/article/view/v10117-010-0030-5. Acesso em: 17 jul. 2024.