Basyaruddin Abdul Rahman, Mohd., et al. “Microwave Assisted Enzymatic Synthesis of Fatty Acid Sugar Ester in Ionic Liquid-Tert-Butanol Biphasic Solvent System”. Asian Journal of Chemistry, vol. 24, no. 11, June 2012, pp. 5058-62, https://asianpubs.org/index.php/ajchem/article/view/9741.