Salimon, Jumat, and Nadia Salih. “Modification of Epoxidized Ricinoleic Acid for Biolubricant Base Oil With Improved Flash and Pour Points”. Asian Journal of Chemistry, vol. 22, no. 7, June 2010, pp. 5468-76, https://asianpubs.org/index.php/ajchem/article/view/11767.