M. G. Reddi, T. Gomathi, T. Hajeeth, and P. Sudha, “Equilibrium Adsorption and Kinetics Studies on Removal of Chromium and Copper onto Chitosan-g-Maleic Anhydride-g-Styrene”, ajc, vol. 28, no. 9, pp. 2057–2062, Jun. 2016.