Kulshrestha, Shail, et al. “Effect of Ionic Surfactants on the Resolution of Amines of Hydrated Stannic Oxide Impregnated Thin Layer Chromatography”. Asian Journal of Chemistry, vol. 22, no. 4, Mar. 2010, pp. 2507-10, https://asianpubs.org/index.php/ajchem/article/view/11436.