Lim, C.J., et al. “Phase Behaviour of Nonionic Surfactants in New Palm Oil Esters-Based Emulsion for Glyphosate Isopropylamine Formulation”. Asian Journal of Chemistry, vol. 24, no. 10, May 2012, pp. 4601-5, https://asianpubs.org/index.php/ajchem/article/view/9718.