Qin, Xin-Ying, et al. “Reaction of Aldehydes and 5,5-Dimethyl-1,3-Cyclohexanedione in the Presence of Surfactants in Water”. Asian Journal of Chemistry, vol. 22, no. 2, Mar. 2010, pp. 1173-8, https://asianpubs.org/index.php/ajchem/article/view/11246.