Valiathan, M.S. (2003) The Legacy of Caraka Orient Longman (ISBN81-250-2505-7) reviewed in Current Science, Vol.85 No.7 Oct 2003, Indian Academy of Sciences seen at [1] June 1, 2006
infinityfoundation.com
Chattopadhyaya, D. (1982) Case for a critical analysis of the Charak Samhita In Studies in the History of Science in India (Ed. D. Chattopadhyaya). Vol. 1. New Delhi: Editorial Enterprises. p. 209-236. cited in Tiwari, Lalit “A Summary of the Late D. Chattopadhyaya's Critique of Charaka Samhita” seen at [2] June 1, 2006