Sojka, Elżbieta. “Multidimensional Comparative Analysis of Demographic Growth of Voivodeships in Poland”. Bulletin of Geography. Socio-economic Series, no. 9 (December 22, 2008): 5–20. Accessed July 18, 2024. https://apcz.umk.pl/BGSS/article/view/v10089-008-0001-y.