Pieńkowska-Kamieniecka, Sylwia. “Selected Aspects of Supplementary Pension Savings a Behavioral Perspective”. Studia Oeconomica Posnaniensia 5, no. 10 (October 31, 2017): 9–22. Accessed September 3, 2026. https://journals.ue.poznan.pl/soep/article/view/3735.