Al-Ma’mun: an Historical Overview. جماعة, Beer-Sheva, Israel, v. 14, p. 59–64, 2005. DOI: 10.64166/rrvdfq78. Disponível em: https://jamaa.bgu.ac.il/index.php/jamaa/article/view/222. Acesso em: 27 ديسمبر. 2025.