Sivakumar, G., et al. “Aqueous Polymerization of Divinyl Monomers Initiated by Mn(III)-Amino Acid Chelating Agents”. Asian Journal of Chemistry, vol. 24, no. 12, Aug. 2012, pp. 5530-2, https://asianpubs.org/index.php/ajchem/article/view/9924.