JAKUBOWICZ, Edyta; JANC, Krzysztof. Regional social structures in the European Union. Bulletin of Geography. Socio-economic Series, [S. l.], n. 5, p. 173–191, 2006. DOI: 10.1515/2481. Disponível em: https://apcz.umk.pl/BGSS/article/view/2481. Acesso em: 8 jul. 2025.