Schuller, Bernd-Joachim. “LIVING STANDARD AND QUALITY OF LIFE IN THE EU AND THE MEMBERSHIP CANDIDATE COUNTRIES”. Acta Scientiarum Polonorum. Oeconomia 8, no. 1 (March 30, 2009): 89–102. Accessed July 3, 2024. https://aspe.sggw.edu.pl/article/view/806.