Nasir, L. M., V. Ogbeide-Igiebor, and I. I. Ozigis. “Emission Characterization of Petrol, Ethanol and Spent Engine Oil Blends for Two-Stroke Spark Ignition Engine”. ABUAD Journal of Engineering Research and Development, Vol. 6, no. 2, Aug. 2023, pp. 39-49, doi:10.53982/ajerd.2023.0602.05-j.