OPIOŁA, W.; TRZCIELIŃSKA-POLUS, A. The phenomenon of borderlands. Border and Regional Studies, [S. l.], v. 1, n. 1, p. 6–11, 2013. DOI: 10.25167/ppbs1057. Disponível em: https://czasopisma.uni.opole.pl/index.php/p/article/view/1057. Acesso em: 11 aug. 2025.