Rāġib, Māykil Ḥilmiī [Ragheb, Mickel Helmy], aṯ-Ṯīʾuṭūkīyāt al-ḥabašīya (Widdāsī Māryām) fī ḍawʾ ʾaṣlihā al-qibṭī wa-turāṯ at-tarānīm aš-šarqīya al-ʾuḫrā (‘The Abyssinian Theotokia (Widdāsī Māryām) in View of Their Coptic Origin and the Heritage of the Other Oriental Hymns’)
