Aziz Ramadan, A., Mandil, H. and Ozoun, A. (2013) “Determination of Se(IV) in Pharmaceuticals by Using Different Operating Modes of Pulse Anodic Stripping Voltammetric Analysis with Methylene Blue-Nafion Modified Gold Electrode”, Asian Journal of Chemistry, 25(6), pp. 3393–3397. doi: 10.14233/ajchem.2013.13850.