1. D. Balasubramanian and N. Appaji Rao, The Indian Human Heritage ( Hyderabad: Universities Press, 1998 ).
2. Madhusudan Mishra, From Indus to Sanskrit ( Delhi: Yugank Publishers, 1996 ).
3. Michel Danino, The Invasion that Never Was ( Mysore: Mira Aditi, 1996 ).
4. S. Radhakrishnan, The Principal Upanishads (London: George Allen and Unwin, 1953 ); Sri Aurobindo, Eight Upanishads ( Pondicherry: Sri Aurobindo Ashram, 1953 ).
5. S. Radhakrishnan, The Bhagavadgita (London: George Allen and Unwin, 1948); Sri Aurobindo, The Message of the Gita (Pondicherry: Sri Aurobindo Ashram, 1938); T. R. Anantharaman, Die Bhagavad-gita in Sanskrit und Deutsch (Stuttgart: Guenther, 1961); Vinoba Bhave, Gespräche über die Gita (Gladenbach: Hinder and Deelmann, 1974 ); Swami Vivekananda, Thoughts on the Gita ( Calcutta: Advaita Ashram, 1997 ).