L. Hung, N. Anh, V. Ha, and P. Phong, “Anodic Stripping Voltammetric Determination of Trace Cadmium Using Carbon Paste Electrode Modified by 1-Butyl-3-methylimidazolium Tetraflouroborate Ionic Liquid”, ajc, vol. 26, no. 22, pp. 7557–7563, Nov. 2014.