Ptak-Chmielewska, Aneta. “BUSINESS DEMOGRAPHY ISSUES AND EMPIRICAL RESEARCH ON DYNAMICS OF ENTERPRISES’ POPULATION IN POLAND”. Acta Scientiarum Polonorum. Oeconomia 10, no. 1 (March 30, 2011): 69–81. Accessed May 7, 2024. https://aspe.sggw.edu.pl/article/view/617.