Skaff, Jonathan Karam. “The Tomb of Pugu Yitu (635–678) in Mongolia: Tang-Turkic Diplomacy and Ritual”. Studia Uralo-altaica 53 (January 23, 2020): 295–307. Accessed April 30, 2024. https://www.analecta.hu/index.php/stualtaica/article/view/33244.