Marinow, Kirił. “Lord Kubrat and His Five Sons. Theophanes’ View of the Bulgarians’ Arrival in the Balkan Peninsula”. Balcanica Posnaniensia. Acta et studia 23 (January 26, 2017): 15–34. Accessed November 24, 2024. https://pressto.amu.edu.pl/index.php/bp/article/view/6795.