History of civilizations of Central Asia. Volume IV. The age of achievement: A.D. 750 to the end of the fifteenth century. Part II: The achievements (2000)
Richard N. Frye and Aydin M. Sayili. Turks in the Middle East before the Saljuqs // Journal of the American Oriental Society. Vol. 63, No. 3. Published by American Oriental Society. — Jul.–Sep. 1943, pp. 194–207. File format: PDF File size: 2.87 Mb