KUREK, Sławomir. The population ageing process against vital statistical changes in Polish towns. Bulletin of Geography. Socio-economic Series, [S. l.], n. 3, p. 83–95, 2004. DOI: 10.1515/2511. Disponível em: https://apcz.umk.pl/BGSS/article/view/2511. Acesso em: 7 jul. 2025.