1. Braun-Blanquet, J., 1932 English translation by G.D. Fuller, and H.S. Conard, 1965. Plant Sociology. Hafner Publishing Company, New York and London.
2. Clapham, A.R., Tutin, T.G. and Warburg, E.F., 1962 (2nd edit.). Flora of the British Isles Cambridge University Press.
3. Cook, C.D.K., 1968.The vegetation of the Kainji Reservoir site in Northern Nigeria. Vegatatio. 15: 225–243.
4. Cook, C.D.K., Gut, B J., Rix, E.M., Schneller. J. and Seitz, M., 1974. Water plants of the world. Dr. W. Junk, The Hague.
5. Den Hartog, C. and Segal, S., 1964. A new classification of the water-plant communities. Acta Botanica Neerlandica 13: 367–393.