Чешмеджиев, Димо, and Anita Kasabova. “Notes on the Cult of the Fifteen Tiberioupolitan Martyrs in Medieval Bulgaria”. Studia Ceranea 1 (December 30, 2011): 143–156. Accessed January 14, 2026. https://www.czasopisma.uni.lodz.pl/sceranea/article/view/5538.