Marinow, Kirił. “Asparuh and His People on the Lower Danube through the Eyes of Theophanes, or a Story That Was Not Meant to Happen”. Studia Ceranea 8 (December 30, 2018): 167–191. Accessed May 2, 2024. https://czasopisma.uni.lodz.pl/sceranea/article/view/4255.