Wronowska, Gabriela, and Janusz Rosiek. “SOCIAL CONVERGENCE IN THE EU-28 COUNTRIES IN THE LIGHT OF THE IMPLEMENTATION OF THE EUROPE 2020 STRATEGY. THE DEA APPROACH”. Acta Scientiarum Polonorum. Oeconomia 18, no. 3 (September 30, 2019): 111–119. Accessed November 25, 2024. https://aspe.sggw.edu.pl/article/view/201.