DŁUGOSZ, Zbigniew. Present state and the perspectives of the ageing of European population. Bulletin of Geography. Socio-economic Series, [S. l.], n. 8, p. 17–28, 2007. DOI: 10.1515/2428. Disponível em: https://apcz.umk.pl/BGSS/article/view/2428. Acesso em: 8 jul. 2025.