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 May 18, 2024. https://js.wne.sggw.pl/index.php/aspe/article/view/3817.