KŁOS, J. Internal boundaries – external boundaries in the American context. Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica, [S. l.], n. 26, p. 47–61, 2016. DOI: 10.18778/1508-1117.26.03. Disponível em: https://czasopisma.uni.lodz.pl/fgsoe/article/view/1213. Acesso em: 17 may. 2024.