(en) Irfan Shahîd, Byzantium and the Arabs in the Sixth Century: pt. 1. Political and military history, Dumbarton Oaks Research Library and Collection, (ISBN978-0-88402-214-5, lire en ligne)
(en) Cyril Elgood, A Medical History of Persia and the Eastern Caliphate: From the Earliest Times Until the Year A.D. 1932, Cambridge University Press, (ISBN978-1-108-01588-2, lire en ligne)