PARYSEK, Jerzy J. and MIERZEJEWSKA, Lidia. Trajectories of the demographic development of Poland after 1989. Bulletin of Geography. Socio-economic Series. Online. 29 June 2012. No. 17, pp. 109-115. [Accessed 8 July 2024]. DOI 10.1515/v10089-012-0011-7.