SCHUBERT, Gabriella. “Bulgaria: What It Is and What It Will Become”. Bulgaria from a German Perspective in 1915. Zeitschrift für Balkanologie, [S. l.], v. 52, n. 1, 2016. Disponível em: https://www.zeitschrift-fuer-balkanologie.de/index.php/zfb/article/view/484. Acesso em: 16 oct. 2026.