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Orzech 2006. Orzech, Charles D. (2006). "The 'Great Teaching of Yoga', the Chinese Appropriation of the Tantras, and the Question of Esoteric Buddhism". Journal of Chinese Religions. 34 (1). Informa UK Limited: 29–78. doi:10.1179/073776906803525165. ISSN0737-769X.
Dowman 1985, Introduction. Dowman, Keith (tr.) (1985). Masters of Mahāmudrā: Songs and Histories of the Eighty-four Buddhist Siddhas. Ithaca, New York: State University of New York Press. ISBN978-0-88706-158-5.
Dalton, Jacob & van Schaik, Sam (2007). Catalogue of the Tibetan Tantric Manuscripts from Dunhuang in the Stein Collection [Online]. Second electronic edition. International Dunhuang Project. Source: [1]Archived 2008-05-28 at the Wayback Machine (accessed: Tuesday February 2, 2010)
Orzech 2006. Orzech, Charles D. (2006). "The 'Great Teaching of Yoga', the Chinese Appropriation of the Tantras, and the Question of Esoteric Buddhism". Journal of Chinese Religions. 34 (1). Informa UK Limited: 29–78. doi:10.1179/073776906803525165. ISSN0737-769X.