Omer, Spahic. “The ʿAbbāsids and the Architectural Development of the Prophet´s Mosque: The Consequences of a Political Disintegration”. Ilahiyat Studies 7, no. 2 (February 24, 2017): 207–231. Accessed September 29, 2023. https://ilahiyatstudies.org/journal/article/view/360.