Daum, Werner. “The ‘cupola’ of the Ṣanʿāʾ Cathedral: It Still Exists”. Proceedings of the Seminar for Arabian Studies 54 (September 11, 2025): 49–56. Accessed December 28, 2025. https://www.archaeopresspublishing.com/ojs/index.php/PSAS/article/view/2637.