Majerowska, Ewa, and Magdalena Gostkowska-Drzewicka. “Impact of the Sector and of Internal Factors on Profitability of the Companies Listed on the Warsaw Stock Exchange”. Dynamic Econometric Models 18 (December 28, 2018): 115–127. Accessed July 18, 2024. https://apcz.umk.pl/DEM/article/view/DEM.2018.007.