: Theodosios von Alexandrien (535–566), Ökumenischer Patriarch der Miaphysiten, in: Zeitschrift für katholische Theologie 121 (1999) 396–412.

: Theodosios of Alexandria and some theological trends of his time (535–566), in: The Harp. A Review of Syriac and Oriental Ecumenical Studies 21 (2006) 73–89.

. Official web site of the Greek Orthodox Patriarchate of Alexandria and All Africa. Retrieved 2011-02-07.

[Pope Theodosius I] (in Arabic). Official website of St. Takla Haymanot's Church. Retrieved 2011-02-13.