Jelaskan 2000 dari Walter Kaegi

Society and Institutions in Byzantine Africa. In: Ai confini dell'impero. Storia, arte e archeologia della Sardegna bizantina. (Cagliari, Sardinia, Italy: M & T Sardegna, 2002) pp. 15–28.

Heraclius Emperor of Byzantium. Cambridge University Press (2003).

Confronting Islam: Emperors versus Caliphs (641-c. 850). In: Cambridge History of the Byzantine Empire, (2008) 365-394.

Muslim Expansion and Byzantine Collapse in North Africa. Cambridge University Press (2010).