Coba jelasin Sumber dari Flavius Optatus dong

Barnes, Timothy David, Constantine and Eusebius (1981)

Kelly, Christopher, Bureaucracy and Government in The Cambridge Companion to The Age of Constantine (ed. Lenski, Noel) (2011)

Martindale, J. R.; Jones, A. H. M, The Prosopography of the Later Roman Empire, Vol. I AD 260-395, Cambridge University Press (1971)