Atiya, Aziz Suryal. Pope in the Coptic Church. The Coptic encyclopedia, volume 6. p. 3. Archived from the original on 20 November 2016. Retrieved 20 November 2016.
Atiya, Aziz Suryal. Pope in the Coptic Church. The Coptic encyclopedia, volume 6. p. 3. Archived from the original on 20 November 2016. Retrieved 20 November 2016.