Marinow, Kirił, and Michał Zytka. “In the Shackles of the Evil One The Portrayal of Tsar Symeon I the Great (893–927) in the Oration ‘On the Treaty With the Bulgarians’”. Studia Ceranea 1 (December 30, 2011): 157–190. Accessed December 23, 2025. https://czasopisma.uni.lodz.pl/sceranea/article/view/5539.