KWIATEK, J.; KWIATEK, A. On the frontier questions denoting Silesia and Lesser Poland in the interwar period. Border and Regional Studies, [S. l.], v. 5, n. 2, p. 73–104, 2017. DOI: 10.25167/ppbs386. Disponível em: https://czasopisma.uni.opole.pl/index.php/p/article/view/386. Acesso em: 4 dec. 2024.