Rinpoche D. Ancient Wisdom: Sleep Yoga, Meditation, and Transformation in the Nyingma Tradition. In Russian (ask us if in doubt)/Rinpoche D. Drevnyaya mudrost': yoga sna, meditatsiya i transformatsiya v traditsii N'ingma. Comments by Gyatrul Rinpoche. Translated from Danilevich T. Penza. Dharma. 2004. 168 p. SKUalb5554a22a7316cf4b.