Dhanitha M.A., Nimisha K.V., and Janardanan C. “Ion Exchange Kinetics of Pb2+, Cu2+, Cd2+ and Mn2+ Ions on Thermally Stable Bimetallic Ion Exchange Material: TitaniumTin Tungstate”. International Journal of Research in Chemistry and Environment (IJRCE), vol. 5, no. 4, Sept. 2015, pp. 110-6, https://ijrce.org/index.php/ijrce/article/view/343.