Siaw, W. C., Tan, L. S., Kiew, P. L., Tsuji, T., & Murshid, G. (2023). Synthesis of Biodiesel from Palm Oil Using a Hybrid Mechanical Stirring and High Frequency Ultrasonic-Assisted Enzyme-Catalysed Process. Chemical Engineering Transactions, 106, 1057-1062. https://doi.org/10.3303/CET23106177