1. Books LLC. Branches of Buddhism: Hinayana, Pragmatic Buddhism, Schools of Buddhism, Buddhist Modernism, Southern, Eastern and Northern Buddhism. Memphis: General Books LLC; 2010.
2. Potter KH. Nāgārjuna and Mādhyamika Buddhism (from Presuppositions of India’s Philosophies). Westport: Greenwood Press; 1976. http://www.advayavada.com/nagarjuna-and-madhyamika-buddhism-potter/ .
3. Radhakrishnan S. Principal Upanishads. New Delhi: Harper Collins; 1994.
4. Pruthi RK. Prehistory and Harappan civilization. New Delhi: A.P.H. Publishing; 2004.
5. Danino M. The Lost River: on the Trail of the Saraswati. London: Penguin; 2010.