Saimon, N. N., Thavil, S., Jusoh, M., Ngadi, N., & Zakaria, Z. Y. (2018). Preparation of Ti-SO3H/ICG Using Microwave-Assisted for Esterification of Palm Fatty Acid Distillate to Methyl Ester. Chemical Engineering Transactions, 63, 463-468. https://doi.org/10.3303/CET1863078