Herbermann 1913. Herbermann, Charles George (1913). "Pope Honorius I". The Catholic Encyclopedia: an International Work of Reference on the Constitution, Doctrine, Discipline, and History of the Catholic Church. New York: Encyclopedia Press.
Ostrogorsky 1957, p. 107. Ostrogorsky, George (1957). History of the Byzantine State. Translated by Hussey, Joan. New Brunswick: Rutgers University Press. OCLC2221721.
Ostrogorsky 1957, pp. 107–109. Ostrogorsky, George (1957). History of the Byzantine State. Translated by Hussey, Joan. New Brunswick: Rutgers University Press. OCLC2221721.
Ostrogorsky 1957, pp. 111–115. Ostrogorsky, George (1957). History of the Byzantine State. Translated by Hussey, Joan. New Brunswick: Rutgers University Press. OCLC2221721.
Ostrogorsky 1957, p. 115. Ostrogorsky, George (1957). History of the Byzantine State. Translated by Hussey, Joan. New Brunswick: Rutgers University Press. OCLC2221721.
Ostrogorsky 1957, p. 114. Ostrogorsky, George (1957). History of the Byzantine State. Translated by Hussey, Joan. New Brunswick: Rutgers University Press. OCLC2221721.