Somnuk K, Theppaya T, Smithmaitrie P, Prateepchaikul G. Optimization of High Free Fatty Acid Reduction in Mixed Crude Palm Oil Using Ultrasound: A Response Surface Methodology Approach. Agr. Nat. Resour. [internet]. 2015 Aug. 31 [cited 2026 Aug. 30];49(4):651-62. available from: https://li01.tci-thaijo.org/index.php/anres/article/view/243722