“OPTIMIZATION OF BIODIESEL PRODUCTION FROM USED OIL OF FISH PROCESOR USING SODIUM METHOXIDE AND SULPHONATED EGG-SHELLS AS CATALYST”. FUDMA JOURNAL OF SCIENCES 7, no. 4 (August 30, 2023): 284–292. Accessed September 11, 2025. http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1929.