Schneider, Irene. «Freedom and Slavery in Early Islamic Time (1st/7th and 2nd/8th Centuries)». Al-Qanṭara 28, no. 2 (diciembre 30, 2007): 353–382. Accedido abril 24, 2024. https://al-qantara.revistas.csic.es/index.php/al-qantara/article/view/41.