BRZOSKO-SERMAK, A. Theoretical deliberations on frontier location of cities. Bulletin of Geography. Socio-economic Series, [S. l.], n. 7, p. 73–86, 2007. DOI: 10.1515/2445. Disponível em: https://apcz.umk.pl/BGSS/article/view/2445. Acesso em: 8 jul. 2024.