STAYKOV, Stephan (Stoycho). Patriarch Cyril as a Church Historian. Forum Theologicum Sardicense, [S. l.], n. 1, p. 57–72, 2025. Disponível em: https://periodicals.uni-sofia.bg/index.php/forum-theologicum-sardicense/article/view/316. Acesso em: 12 aug. 2025.