Martindale, John R.; Jones, A.H.M.; Morris, John (1992), The Prosopography of the Later Roman Empire – Volume III, AD 527–641, Cambridge University Press, ISBN0-521-20160-8
Olster, David Michael, The Politics of Usurpation in the Seventh Century: Rhetoric and Revolution in Byzantium, (Adolf M Hakkert, 1993) ISBN 90-256-1010-2
