Faber 1985 - Tibetan Dunhuang Treatise on Simultaneous Enlightenment
Chatterjee 2008 - The Persianization of Itihasa
Uray 1983 - Tibet's Connections with Nestorianism and Manicheism in the 8th-10th Centuries.pdf
Kragh 2013b - All Mind, No Text - All Text, No Mind
