OPTIMIZATION OF BIODIESEL PRODUCTION FROM USED OIL OF FISH PROCESOR USING SODIUM METHOXIDE AND SULPHONATED EGG-SHELLS AS CATALYST. FJS [Internet]. 2023 Aug. 30 [cited 2025 Sep. 17];7(4):284-92. Available from: http://162.254.38.185/index.php/fjs/article/view/1929