DĘBSKI, Wiesław; FEDER-SEMPACH, Ewa; ŚWIDERSKI, Bartosz. Are Beta Parameters Stable on the Warsaw Stock Exchange?. Kwartalnik Kolegium Ekonomiczno-Społecznego. Studia i Prace, [S. l.], v. 3, n. 3, p. 65–74, 2015. DOI: 10.33119/KKESSiP.2015.3.3.5. Disponível em: https://econjournals.sgh.waw.pl/kwes/article/view/381. Acesso em: 21 maj. 2024.