YOVCHEV, Ivan. Orthodox – Old Catholic Dialogue (Negotiations for Unification). Forum Theologicum Sardicense, [S. l.], n. 2, p. 7–44, 2025. Disponível em: https://periodicals.uni-sofia.bg/index.php/forum-theologicum-sardicense/article/view/400. Acesso em: 11 aug. 2025.