Banaszczak-Soroka, Urszula. “The Economic and Financial Situation of General Pension Societies (PTE) in the Years 2002 – 2015 (Selected Aspects)”. Economic and Environmental Studies 17, no. 1 (41) (November 23, 2020): 11–24. Accessed November 23, 2024. https://czasopisma.uni.opole.pl/index.php/ees/article/view/2678.