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Itineraries of the Roman emperors, 337–361

Zosimus, Historia Nova, Book 2 Historia Nova

Aurelius Victor, Epitome de Caesaribus

Eutropius, Breviarium ab urbe condita

DiMaio, Michael; Frakes, Robert, Constans I (337–350 A.D.) , in De Imperatoribus Romanis (D.I.R.), An Online Encyclopedia of Roman Emperors

Jones, A.H.M., Martindale, J.R. The Prosopography of the Later Roman Empire, Vol. I: AD260-395, Cambridge University Press, 1971

Gibbon. Edward Decline & Fall of the Roman Empire (1888)