Dominiak, Joanna. “Modern Services and Socio-Economic Development Factors – Analysis of Relations in the System of European Union Countries”. Studies of the Industrial Geography Commission of the Polish Geographical Society 34, no. 1 (March 30, 2020): 20–31. Accessed November 21, 2024. https://prace-kgp.uken.krakow.pl/article/view/7091.