The Cambridge Medieval History . Volume 4/1 , The Byzantine Empire : byzantium and its neighbours - Nicol, Donald MacGillivray 1923-2003; Hussey, J. M. 1907-2006 (Cambridge [etc.] At The University Press, 1966)
Keywords: Islam -- -Historia política -- -Siglo XXI; Bizancio -- -Historia; Europa -- -Historia -- -Edad Media