- Okuku, E.O and Peter, H. K. Choose of Heavy Metals Pollution Biomonitors: A Critic of the Method that uses Sediments total Metals Concentration as the Benchmark. International Journal of Environmental Reearch., 6(1):313-322,2012
- Kiteresi, L.I., Okuku, E.O, Mwangi, S. N, Ohowa, B, Wanjeri, V.O. ,Okumu, S. and Mkono, M. The Influence of Land Based Activities on the Phytoplankton Communities of Shimoni-Vanga system, Kenya. International Journal of Environmental Reearch.6(1):151-162, 2012.