Haldon J.F., Byzantium in the Seventh Century. The Transformation of a Culture, Cambridge 1991

Head C., Justinian II of Byzantium, Madison – Milwaukee – London 1972

Brooks E.W., "The Sicilian Expedition of Constantine IV", Byzantinische Zeitschrift, 17, 1908, 455-459

Brooks E.W., "The Brothers of Emperor Constantine IV", English Historical Review, 30, 1915, 42-51

El Cheikh N.M., Byzantium Viewed by the Arabs, London 2004, Harvard Middle Eastern monographs 36

Greatrex G., Lieu S.N.C., The Roman Eastern Frontier and the Persian Wars A.D. 363-630, London 2002

Kaegi W.E., Heraclius, Emperor of Byzantium, Cambridge 2003

Kaestner J., De imperio Constantini III (641-668), Leipzig 1907

Reinink, G. J. and Stolte, B. H. (eds.), The Reign of Heraclius (610-641): Crisis and Confrontation, Leuven 2002

Rösch G., "Der Aufstand der Herakleioi gegen Phokas (608-10) in Spiegel Numismatischer Quellen", Jahrbuch der Österreichischen Byzantinistik, 28, 1979, 51-62

Stratos A., "La première campagne de l’Empereur Héraclius contre les Perses", Jahrbuch der Österreichischen Byzantinistik, 28, 1979, 63-74

Stratos A., Byzantium in the Seventh Century, 5 vols, Amsterdam 1968-1980, Ogilvie-Grant, M. – Hionides, H. (trans.)

Zuckerman C., "Heraclius in 625", Revue des Etudes Byzantines, 60, 2002, 189-97