OPFER, Björn. The “Bulgarian” School System in Vardar-Macedonia, its Origins and Reactivation in the War Years 1915–1918. Zeitschrift für Balkanologie, [S. l.], v. 40, n. 2, 2004. Disponível em: https://www.zeitschrift-fuer-balkanologie.de/index.php/zfb/article/view/37. Acesso em: 17 oct. 2026.