T., S., C. J. Ogugbue, and G. C. Okpokwasili. “Laboratory-Scale Degradation of Crude Oil in a Simulated Low Energy Environment”. The International Journal of Science & Technoledge, vol. 4, no. 4, Apr. 2016, http://internationaljournalcorner.com/index.php/theijst/article/view/123857.