Dvornik 1966, p. 47: "Pope Damasus offered no protest against the elevation of Constantinople, even though Alexandria had always been, in the past, in close contact with Rome... Everyone continued to regard the Bishop of Rome as the first bishop of the Empire, and the head of the church." Dvornik, Francis (1966). Byzantium and the Roman primacy. New York: Fordham University Press. ISBN9780823207015.
One or more of the preceding sentences incorporates text from a publication now in the public domain: Oestreich, Thomas (1907). "Pope Boniface III". In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 2. New York: Robert Appleton Company.