Karimah, Y. M., Dampang, S., Nazhifa, A. S., Alfiyah, R., & Jayanti, A. (2026). Effects of Reaction Temperature and Phosphoric Acid Catalyst Volume on Free Fatty Acid Reduction in Used Cooking Oil via Esterification. SAINTEKS : Jurnal Sain Dan Teknik, 8(02), 313–323. https://doi.org/10.37577/sainteks.v8i02.1183