Coakley (1999), p. 65, 66: "Catholikos-Patriarchs of the East who served on the throne of the church of koke in Seleucia-Ktesiphon". Coakley, James F. (1999). "The Patriarchal List of the Church of the East". After Bardaisan: Studies on Continuity and Change in Syriac Christianity. Louvain: Peeters Publishers. pp. 65–84. ISBN9789042907355.