MOHAMAD NORDIN, N. A.; ADNAN, N. F.; HAMZAH, N.; WAN ISAHAK, W. N. R.; SALIMON, J.; YARMO, M. A. Monoestolides Synthesis From Ricinoleic-Oleic Acids Using Silicotungstic Acid Sol-Gel Catalyst. Journal of Science and Technology, v. 2, n. 2, 11.