OPIOŁA, W. Editorial: More divided than ever. About the border walls in the twenty-first century. Border and Regional Studies, [S. l.], v. 6, n. 2, p. 79–82, 2018. DOI: 10.25167/ppbs52. Disponível em: https://czasopisma.uni.opole.pl/index.php/p/article/view/52. Acesso em: 4 dec. 2024.