مرعي سامي, and فحصة كنوز. “Titles of the Abbasid Caliphs in the First Round (132-232 AH / 750-847 CE)”. Tishreen University Journal- Arts and Humanities Sciences Series 43, no. 1 (February 24, 2021). Accessed May 17, 2024. https://journal.tishreen.edu.sy/index.php/humlitr/article/view/10383.