Jabbar, Md Abdul, and Md Riad Hossain Sabuj. “Electrochemical Studies on the Removal of Cadmium by Methylated Xanthine Bases from Aqueous Solution”. Bangladesh Journal of Scientific Research, vol. 25, no. 1, Dec. 2012, pp. 11-22, doi:10.3329/bjsr.v25i1.13046.