1. Cook, C. D. K., 1980. The status of some Indian endemic plants. IUCN Threatened Plant Committee Newsletter 6: 17–19.
2. Cook, C. D. K. & Lüond, R., 1982. A revision of the genus Hydrilla (Hydrocharitaceae). Aquat. Bot. 13: 485–504.
3. Hajra, P. K. & Jain, S. K., 1978. Flora of Kaziranga National Park. Unpublished manuscript.
4. Ikusima, I., 1983. Human impact on aquatic macrophytes. In: Holzner, W., Werger, M. J. A. & Ikusima, I. (eds), Man’s Impact on Vegetation, pp. 69–75. Junk, The Hague.
5. Jain, S. K., 1987. The problem of endangered species: its study and solution. Presidential address, Section of Biological Sciences, 57th Annual session, National Academy of Sciences, India, Allahabad. 44pp.