DŁUGOSZ, Zbigniew. The level and dynamics of population ageing process on the example of demographic situation in Europe. Bulletin of Geography. Socio-economic Series, [S. l.], n. 2, p. 5–15, 2003. DOI: 10.1515/2519. Disponível em: https://apcz.umk.pl/BGSS/article/view/2519. Acesso em: 21 feb. 2025.