KOMPA, Krzysztof and WITKOWSKA, Dorota. Performance of Pension Funds and Stable Growth Open Investment Funds During the Changes in the Polish Retirement System. Dynamic Econometric Models. Online. 29 December 2016. Vol. 16, no. 1, pp. 117-131. [Accessed 11 March 2026]. DOI 10.12775/DEM.2016.007.