Kenneth Meyer Setton et Marshall W. Baldwin, A History of the Crusades, vol. 1, Univ of Wisconsin Press, , 740 p. (ISBN978-0-299-04834-1, lire en ligne), p. 119
Abdul Ali, Islamic dynasties of the Arab East : state and civilization during the later medieval times, M.D. Publications Pvt. Ltd., , 142 p. (ISBN978-81-7533-008-5, lire en ligne), p. 62-63
Farhad Daftary, A Modern History of the Ismailis: Continuity and Change in a Muslim Community, [1]
