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 21 October 2024]. DOI 10.12775/DEM.2016.007.