Jokiel, Barbara, Barbara Miszewska, and Michał Slenczek. “Structural Changes in Groups of Employees in Big Cities in Poland, 1992-2001”. Bulletin of Geography. Socio-economic Series, no. 4 (December 1, 2005): 79–100. Accessed December 14, 2025. https://apcz.umk.pl/BGSS/article/view/2489.