Kazhdan, Alexander. 1991. John of Damascus. In , vol. 2, 1063?1064.

Kazhdan, Alexander, D.  Conomos & N.  ?ev?enko. 1991. Joseph the Hymnographer. In , The Oxford Dictionary of Byzantium, vol. 2, 1074?1075. (The Oxford Dictionary Of Byzantium). New York-Oxford: Oxford University Press.