[12]C.E.Bosworth，The Encyclopedia ofIslam，Vol IV，1978.
[13]Chevedden，Paul E.，“The Inventionof the Counterweight Trebuchet：A Studyin Cultural Diffusion”，Dumbarton Oaks，2000.
[14]Clayton Dube，The Mongols inWorld History，Columbia University，Weatherhead East Asian Institute，2002.
[15]Christopher Dawson，The MongolMission:Narratives and Letters of theFranciscan Missionaries in Mongolia andChina in the Thirteenth and FourteenthCenturies，London：Sheed and Ward，19 55.
[16]Claude Cahen，“K.se Dagh”，Encyclopaedia of Islam，ed.by P.Bearman.
[17]Claude Cahen，“Pre-Ottoman Turkey：a general survey of the material andspiritual culture and history”，trans.J.Jones-Williams.
[18]Colin McEvedy，Atlas of WorldPopulation History，Viking，1978.
[19]Daniel Romanovich，EncyclopadiaBritannica，2007，Britannica ConciseEncyclopedia.
[20]David Abulafia，The New CambridgeMedieval History：c.1198-c.1300，CambridgeUniversity Press，19.
[21]David Nicolle，Medieval Warfare
Source Book:Warfare in Western Christendom，London：Arms and Armour，19 5.
[22]David Nicolle，“The Mongol Warlords：Ghengis Khan，Kublai Khan，Hulegu，Tamerlane”，Heroes&warriors.
2[3]Denis Sinor“,The Inner Asian Warriors”，Journal of the American Oriental Society，101，1981.
[24]Dennis，George，“Byzantine HeavyArtillery：The Helepolis”，Greek，Roman，and Byzantine Studies，198.