N. A. Mohamad Nordin, N. F. Adnan, N. Hamzah, W. N. R. Wan Isahak, J. Salimon, and M. A. Yarmo, “Monoestolides Synthesis From Ricinoleic-Oleic Acids Using Silicotungstic Acid Sol-Gel Catalyst”, jst, vol. 2, no. 2, Nov. 2010, Accessed: May 03, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/261