RATAJCZAK-TUCHOŁKA, Joanna. Reforming the Pension System in Poland: 1999-2012. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 1, n. 11, p. s. 75–90, 2013. DOI: 10.18559/8shqm885. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3349. Acesso em: 3 sep. 2026.