The Cambridge Medieval History . Volume 2 , The rise of the saracens and the foundation of the Western Empire - Bury, John B. 1861-1927; Whitney, J. P. 1857-1939; Gwatkin, Henry Melvill 1844-1916 (London [etc.] Cambridge University Press, 1976)
Keywords: Islam -- -Historia política -- -Siglo XXI; Bizancio -- -Historia; Europa -- -Historia -- -Edad Media