R. B. Rackham, “The Text of the Canons of Ancyra”, in Studia Biblica et Ecclesiastica: Essays Chiefly in Biblical and Patristic Criticism by Members of the University of Oxford, vol. 3, Oxford: The Clarendon Press, 1891.
A. Roberts and Donaldson, J., “Origen against Celsus”, in Fathers of the Third Century: Tertullian, Fourth Part; Minucius Felix; Commodian; Origen, Parts First and Second, Buffalo: Charles Scribner's Sons, 1885.