Pradines, Stéphane. “Islamic Archaeology in the Comoros: The Swahili and the Rock Crystal Trade With the Abbasid and Fatimid Caliphates”. Journal of Islamic Archaeology 6, no. 1 (September 18, 2019): 109–135. Accessed December 5, 2024. https://journal.equinoxpub.com/JIA/article/view/12854.