Sajnóg, Artur. “Management of Equity and Profitability of the Joint-Stock Companies Listed on the Frankfurt Stock Exchange and Warsaw Stock Exchange”. Acta Universitatis Lodziensis. Folia Oeconomica 4, no. 324 (February 15, 2017): [89]-108. Accessed March 13, 2025. https://czasopisma.uni.lodz.pl/foe/article/view/614.