Brzozowska, Zofia A., Mirosław J. Leszka, Kirił Marinow, and Teresa Wolińska, eds. Phantom of Muhammad, Shade of Samuel Byzantine Empire in Relation to Members of Other Cultures and Religions (7th–15th c.): No. XXXIX. Byzantina Lodziensia. Poland: Lodz University Press, 2020. Accessed January 24, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/177.