SCHÜLER, Sonja. A Look at Bulgaria a Year after Joining the European Union. Zeitschrift für Balkanologie, [S. l.], v. 44, n. 2, 2008. Disponível em: https://zeitschrift-fuer-balkanologie.de/index.php/zfb/article/view/159. Acesso em: 15 oct. 2026.