==References==*Brand, Charles M. "Byzantium Confronts the West", 1968, ISBN 0-7512-0053-0*"Brevis Historia Occupationis et Amissionis Terræ Sanctæ," in "Die Chronik des Propstes Burchard von Ursberg", ed.
* Brand, Charles M. "Byzantium Confronts the West", 1968, ISBN 0-7512-0053-0* "Brevis Historia Occupationis et Amissionis Terræ Sanctæ," in "Die Chronik des Propstes Burchard von Ursberg", ed.