Jelaskan Baronius, ad. ann. 588–593 dari Yohanes IV dari Konstantinopel

Acta Sanctorum (Bollandist) August 1, p. 69

Fleury, ii. bk. xxxiv. c. 44, etc.

Fabricius, Bibl. Graec. xi. 108, xii. 239.

Dokos, G., Exomologetarion – A Manual of Confessions by our Righteous God-bearing Father Nikodemos the Hagiorite, 2006, Thessalonica, Uncut Mountain Press

Agapius & Nicodemus, The Rudder (Pedalion) – All the Sacred and Divine Canons, 1957, The Orthodox Christian Educational Society, Chicago