Cecota, Błażej. Islam, the Arabs, and the Image of the Caliphs in the Accounts of the Chronography of Theophanes the Confessor: No. XLIII. Vol. XLIII. Byzantina Lodziensia. Poland: Lodz University Press, 2022. Accessed January 21, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/174.