Ivanov , Ivan. “Teaching of the Orthodox Faith According to the Principles of Liturgical Byzantine Treatises. Testimonies and Interpretation”. Forum Theologicum Sardicense, no. 2 (May 21, 2025): 7–62. Accessed August 13, 2025. https://periodicals.uni-sofia.bg/index.php/forum-theologicum-sardicense/article/view/335.