Brzozowska, Zofia A., Mirosław J. Leszka, and Teresa Wolińska. Muhammad and the Origin of Islam in the Byzantine-Slavic Literary Context. A Bibliographical History: No. XLI. Byzantina Lodziensia. Poland: Lodz University Press, 2020. Accessed January 21, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/185.