Williams, Paul. “The Samadhi of Direct Encounter With the Buddhas of the Present: An Annotated English Translation of the Tibetan Version of the Pratyutpanna-Buddha-Sammukhavasthita-Samadhi-Sutra. Translated by Paul Harrison”. Buddhist Studies Review, vol. 9, no. 2, June 1992, pp. 203-9, https://doi.org/10.1558/bsrv.v9i2.15290.