Wechsler, Howard J. (1979). "T'ai-Tsung (Reign 626-49): The Consolidator". Dalam Denis Twitchett; John Fairbank (ed.). The Cambridge History of China, Volume 3: Sui and T'ang China Part I. Cambridge University Press. ISBN978-0-521-21446-9.
Zhu, Xueyuan (朱学渊) (2004) (Tionghoa)The Origins of the Ethnic Groups of Northern China (中国北方诸族的源流). Beijing: Zhonghua Shuju (中华书局) ISBN 7-101-03336-9
Xue, Zongzheng (薛宗正) (1992) (Tionghoa)A History of the Turks (突厥史). Beijing: Chinese Social Sciences Press (中国社会科学出版社) ISBN 7-5004-0432-8
Ekaterina Nachaeva (2011). "The "Runaway" Avars and Late Antique Diplomacy". Dalam Ralph W. Mathisen, Danuta Shanzer (ed.). Romans, Barbarians, and the Transformation of the Roman World: Cultural Interaction and the Creation of Identity in Late Antiquity. Ashgate.