Leszka, Mirosław. “Simeon I the Great, the Ruler of Bulgaria in the Account of Leo the Deacon (Historia, VII, 7) ”. Balcanica Posnaniensia. Acta et studia 26 (January 24, 2020): 33-41. Accessed May 21, 2022. https://pressto.amu.edu.pl/index.php/bp/article/view/20329.