Lv, Wengang, et al. “Adsorption of Ni(II), Cd(II) from Aqueous Single Metal Solutions by the Palm Thread Impregnated With Sodium Dodecyl Benzene Sulfonate”. Asian Journal of Chemistry, vol. 24, no. 8, Apr. 2012, pp. 3473-8, https://asianpubs.org/index.php/ajchem/article/view/9401.