ŻELAZNY, Jan Witold. Muhammad as a heresiarch in the opinion of Christian authors to John of Damascus. In: BRZOZOWSKA, Zofia A.; LESZKA, Mirosław J.; MARINOW, Kirił; WOLIŃSKA, Teresa (eds.). Phantom of Muhammad, Shade of Samuel Byzantine Empire in Relation to Members of Other Cultures and Religions (7th–15th c.): No. XXXIX. Byzantina LodziensiaPoland: Lodz University Press,2020. p. 279–288. DOI: 10.18778/8142-804-0.15. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/177/chapter/338. Acesso em: 14 feb. 2026.