RATHORE, SANJEETA, et al. “Spectrophotometric Determination of Cobalt(II) After Separation by Adsorption of Its 1-Diethylamino-2-Propanol Complex on Microcrystalline Naphthalene”. Asian Journal of Chemistry, vol. 6, no. 4, June 2010, pp. 995-8, https://asianpubs.org/index.php/ajchem/article/view/24706.