*Soucek, Svatopluk (2000) "A History of Inner Asia", Cambridge University Press.
(1971) "The History of the Mongol Conquests", Routledge & Kegan Paul Ltd. ISBN 0-8122-1766-7* Sicker, Martin (2000) "The Islamic World in Ascendancy: From the Arab Conquests to the Siege of Vienna", Praeger Publishers.