1. Alexiades, M.N. and Sheldon, J.W. (1996). Selected Guidelines for Ethno-botanical Research: A Field Manual. The University of Michigan: New York Botanical Garden
2. Anonymous (2013). WHO Traditional Medicine Strategy: 2014-2023. Geneva: WHO Press
3. Bridson, D. and Forman, L. (2010). The Herbarium Handbook, UK: Kew Publishing
4. Daniel, P. (2005) (Editor). The flora of Kerala. Botanical Survey of India.Kolkata. (2)
5. Gamble, J.S. (1915). Flora of the Presidency of Madras, Vol. 1. Rep. 2004, M/s Bishen Singh Maherdra Pal Singh, Dehradun. https://doi.org/10.5962/bhl.title.21628
6. Gamble, J.S. (1928). Flora of the Presidency of Madras, Vol. 3. Rep. 2004, M/s Bishen Singh Maherdra Pal Singh, Dehradun
7. Goraya, G.S., Ved, D.K. (2017). Medicinal Plants of India: An Assessment of their Demand and Supply. National Medicinal Plants Board, Ministry of Ayush, Government of India, New Delhi and Indian Council of Forestry Research and Education, Dehradun
8. Harilal, M.S. (2008). Linking tribal medicinal plant cooperatives and manufacturing firms for better rural Livelihood and Sustainable use of resources : In: Adaptive Management of Medicinal Plants and Non Timber Forest Products, (edited by Giridhar K, Jagannatha RR) FRLHT, Bangalore and M/s. Bishen Singh Mahendra Pal Singh, Dehradun
9. Henry, A.N., Chithra, V., Balakrishnan, N.P. (1989). Flora of Tamil Nadu, India, Series I, Analysis Volume III. Botanical Survey of India, Coimbatore
10. Henry, A.N., Kumari, G.R., Chitra, V. (1987). Flora of Tamil Nadu, India, Series I, Analysis Volume II. Botanical Survey of India, Coimbatore
11. Jain, S.K., Rao, R.R. (1977). A handbook of field and herbarium methods. Today and Tomorrow's Printers and Publishers. New Delhi
12. Matthew, K.M. (1983). The Flora of the Tamilnadu Carnatic, Vol. 1-3 Rapinat Herbarium, St. Joseph's College
13. Morgan, D.L. (2002). Focus group interviewing. In: Handbook of interviewing research (Edited by J.F. Gubrium and J.A. Holstein), Context and method. Thousand Oaks, CA: Sage.; 141-159. https://doi.org/10.4135/9781412973588.n10
14. Morgan, D.L., Krueger, R.A. (1993). When to use focus group and why. In: Successful Focus groups: Advancing the state of art. (Edited by DL Morgan). Newsbury Park, CA, Sage. https://doi.org/10.4135/9781483349008
15. Nayar, T.S., Rasiya Beegum, A., Mohanan, N. and RajKumar. G. (2006). Flowering plants of Kerala-A Hand Book. TBGRI. Palode
16. Nair, N.C., Henry, A.N., Kumari, G.R., Chitra, V. (1983). Flora of Tamil Nadu, India, Series I, Analysis Volume I. Botanical Survey of India, Coimbatore
17. Narasimhan, S. D. (2006). Quantitative Assessment of Medicinal Plants traded from selected markets in the state of Tamil Nadu.Foundation for Revitalisation of Local Health Traditions, Bangalore and Centre for Floristic Research Madras Christian College, Chennai. (A technical project report)
18. Sasidharan, N. and Muraleedharan, P.K. (2009); Survey on the commercial exploitation and consumption of medicinal plants by the drug industry in Northern Kerala. Kerala Forest Research Institute, Peechi. Report No. 322
19. Sasidharan, N. and Sivarajan, V.V. (1996). Flowering Plants of Thrissur Forest (Western Ghats, Kerala, India). Scientific Publishers, Jodhpur
20. Subramanian, K.N. and Nallaswamy, V.K. (1987). Flora of Palghat. M/s. Bishen Singh Mahendra Pal Singh. Dehradun
21. Suma, T.S. and Ravikumar, K. (2013). Inventory of plant raw drugs available in southern Indian markets.Retrieved on: January 20, 2017, from http://envis.frlht.org/raw-drugs. The Plant List Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 20th Dec. 2017).
22. Torri, M.C. and Herrmann, T.M. (2011). Gram Mooligai Limited Company (GMCL) – An Alternative Bioprospecting and Development Model: Constitution, Structure and Its Functioning. In: Bridges between Tradition and Innovation in Ethnomedicine. Springer, Dordr https://doi.org/10.1007/978-94-007-1113-6_4
23. Vajravelu, E. (1990). Flora of Palghat District (including Silent Valley National Park, Kerala). Botanical Survey of India.Calcutta
24. Ved, D.K. and Goraya, G.S. (2008). Demand and Supply of Medicinal Plants in India. NMPB, New Delhi, FRLHT, Bangaluru and M/s. Bishen Singh Mahendra Pal Singh, Dehradun
25. Ved, D.K., Suma, T.S., Barve, V., Srinivas, V., Sangeetha, S., Ravikumar, K., Kartikeyan, R., Kulkarni, V., Kumar, A.S., Venugopal, S.N., Somashekhar, B.S., Sumanth, M.V., Begum, N., Rani, S., Surekha, K.V. and Desale, N. (2016). (envis.frlht.org/frlhtenvis.nic.in). FRLHT's ENVIS Centre on Medicinal Plants, Bengaluru. Copy Right: FRLHT, Bengaluru and MoEFCC, GoI. Last Updated : 21 August 2017 http://envis.frlht.org
26. World Health Organization. (2009). Counterfeit medicines: frequently asked questions, Available at: http://www.who.int/medicines/services/counterfeit/faqs/QACounterfeit-October 2009. pdf (last accessed 18 December 2013)
27. Yow, V.R. (2005). Recording oral history: a guide for the humanities and social sciences. 2nd ed. CA: Alta Mira Press