@article{ljs28001,
 author={A. Afolabi, E. and S. Kovo, A. and , O. and D Adeniyi,  and Jibrin, A. and S. Abdulkarrem, A. and Suleimam, B.},
 year={2016},
 title={Optimization of the recycle used oil and its fuel quality characterization},
 journal={Leonardo J. Sci.},
 volume={15},
 number={28},
 pages={1-14},
 url={http://ljs.academicdirect.org/A28/001_014.pdf}
}