Jock, Alexander Asanja, Asabe Mercy Magomya, and Saviour Etim Essang. “RECYCLING AND CHARACTERIZATION OF SPENT ENGINE OIL USING TWO STAGES: SOLVENT EXTRACTION AND CLAY PERCOLATION TECHNIQUES”. FUDMA JOURNAL OF SCIENCES 7, no. 3 (June 30, 2023): 182 - 185. Accessed July 20, 2025. https://www.fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1836.