^Richard Burghart, Wandering Ascetics of the Rāmānandī Sect, p.374, History of Religions
Vol. 22, No. 4, Devotional Religion in India (May, 1983), The University of Chicago Press
^Gerald James Larson (1995), India's Agony Over Religion, State University of New York Press, ISBN978-0791424124, page 116
^Ramdas Lamb (2008), Theory and Practice of Yoga (Editor: Knut A Jacobsen), Motilal Banarsidass, ISBN978-8120832329, pages 317-330