Richard Gombrich, A Global Theory of Intellectual Change. Harvard University Press, 2000, p. 205.
Collins 2000, p. 208. Collins, Randall (2000). The Sociology of Philosophies: A Global Theory of Intellectual Change. Harvard University Press. ISBN0-674-00187-7.
Govind Chandra Pande (1994). Life and thought of Śaṅkarācārya. Motilal Banarsidass Publ. ISBN978-81-208-1104-1, ISBN978-81-208-1104-1. Source: [1] (accessed: Friday, 19 March 2010), p.255; "The relationship of Śaṅkara to Buddhism has been the subject of considerable debate since ancient times. He has been hailed as the arch critic of Buddhism and the principal architect of its downfall in India. At the same time, he has been described as a Buddhist in disguise. Both these opinions have been expressed by ancient as well as modern authors—scholars, philosophers, historians, and sectaries."