Parysek, Jerzy J. “Polish Economy in 1990–2018: Balance of Development in New Political Conditions”. Journal of Geography, Politics and Society 11, no. 4 (January 20, 2022): 1–17. Accessed August 11, 2022. https://czasopisma.bg.ug.edu.pl/index.php/JGPS/article/view/6586.