Ayotamuno, M. J., Akor, A. J. and Igho, T. J. (2002). Effluent quality and wastes from petroleum- Drilling operations in the Niger Delta, Nigeria. Environment management and health, 13(2), 207-216
 Okoh, A. I. (2006). Biodegradation alternative in the cleanup of petroleum hydrocarbon pollutants. Biotechnology and molecular biology reviews, 1(2), 38-50.
 United nations environmental programme (UNEP). (2011). In-situ environmental assessment of Ogoniland, Rivers state. www.unep.org, Accessed: 19th January, 2020.
 Ojo, O. A. (2005). Petroleum hydrocarbon utilization by native bacteria population from a wastewater canal southwest Nigeria. African journal of biotechnology. 5(4), 333-337.
 James, G. S. (2002). Hand book of petroleum product analysis, John Wiley and Sons, Inc. New York. 3-7pp.
 Agiri, G. O., Akumagba, P. E., Adimula, H. A. and Edoga, M. O. (2010). Isolation and characterization of petroleum hydrocarbons degrading bacteria from soils around Warri, Delta State, Nigeria. Journal of environmental science, 23(4), 132-139.
 Miyazaki, H. (2005) Method of remedying contaminated soil by microorganisms. US Patent, 6,905,288B2.
 Díaz, M.P., Boyd, K. G., Grigson, S. J. W Burgess, J. G. (2002). Biodegradation of crude oil across a wide range of salinities by an extremely halotolerant bacterial consortium MPD-M, immobilized onto polypropylene fibers. Biotechnology and bioengineering. 79,145-153.
 Chen, K. C., Chen, J. J. and Houng. J. Y. (2000). Improvement of nitrogen removal efficiency using immobilized microorganisms with oxidation-reduction potential monitoring. Journal of industrial microbiology and biotechnology. 25, 229-234.
 Delille, D., Delille, B. and Pelletier, E. (2002). Effectiveness of bioremediation of crude oil contaminated subantartic intertidal sediments: the microbial response. Microbial ecology, 44, 118-126
 Sang-Hwan, l., Seokho, l., Dae Yaeon, k., jeong- gyu, k., (2007). Degradation characteristics of waste lubricants under different nutrient condition. Journal of hazardous materials 143, 65-72.
 Schaefer, M. and Juliane, F. (2007). The influence of earthworms and organic additives on the biodegradation of oil contaminated soil. Applied soil ecology 36(2), 53-62.