1. L.A. Akeredolu(1982 ) Setting water quality standards for Nigeria . FEPA, Port Harcourt, Nigeria.
2. O. Akinbuwa(1988 ) The study of physico-chemical factors and rotifera fauna of Opa reservoir, Ife Ife, Nigeria . Msc Thesis. University of Ife, Nigeria.
3. O. Akinbuwa(1999 ) The rotifer fauna and Physico-chemical conditions of Erinle lake and its major inflows at Ede, Osun State, Nigeria . PhD Thesis , University of Ife, Nigeria.
4. Seasonal variation, distribution and interrelationships of rotifers in Opa Reservoir, Nigeria