D.K. Bharadwaj (13 May 2003). "A big boom in the brain game". Features, Press Information Bureau, Govt of India. Archived from the original on 28 November 2018. Retrieved 21 May 2007.
D.K. Bharadwaj (13 May 2003). "A big boom in the brain game". Features, Press Information Bureau, Govt of India. Archived from the original on 28 November 2018. Retrieved 21 May 2007.