Michael McCormick, Eternal Victory: Triumphal Rulership in Late Antiquity, Byzantium and the Early Medieval West, Cambridge University Press, 1990, ISBN 0-521-38659-4, p. 61.
John Bagnell Bury, A History of the Later Roman Empire from Arcadius to Irene, Adamant Media Corporation, 2005, ISBN 1-4021-8369-0, p. 296
