PODOGRODZKA, Małgorzata. The ageing of the population and the fertility in Poland. Acta Universitatis Lodziensis. Folia Oeconomica, Poland, n. 291, p. 233–248, 2013. DOI: 10.18778/0208-6018.291.19. Disponível em: https://www.czasopisma.uni.lodz.pl/foe/article/view/27576. Acesso em: 9 aug. 2026.