Witoń, Agnieszka. “Inequalities and Socio-Economic Development in EU Countries – Differences in Results Caused by Using Different Measures of Development”. Studia Prawno-Ekonomiczne 106 (December 9, 2018): 337–353. Accessed January 16, 2025. https://ojsltn.uni.lodz.pl/Studia-Prawno-Ekonomiczne/article/view/180.