Narratio Floriacensis de captis Antiochia et Hierosolyma et obsesso Dyrrachio, RHC, Occ., 5, p. 356, Gilbert of Mons, 23, p. 25. Также Becker, Urban II, 2, p. 180 и прежде всего J. Shepard, 'Cross-purposes: Alexius Comnenus and the First Crusade', in J. Phillips (ed.), The First Crusade: Origins and Impact (Manchester, 1997), рp. 107–29.