Penkov, Tsvetomir. “Fr. Mivhail Apostolov – a Confessor from Ovtshartsi(archimandrite Makariy)”. Forum Theologicum Sardicense, no. 2, May 2025, pp. 25-48, https://periodicals.uni-sofia.bg/index.php/forum-theologicum-sardicense/article/view/277.