MANIKANDAN, R.; KAVITHA, B.; RANI, S.  and  SENTHIL KUMAR, N.. Quantification of Picric Acid on Nanosphere Polypyrrole Modified Electrode by Stripping Voltammetry Method. J. Mex. Chem. Soc [online]. 2019, vol.63, n.4, pp.146-154.  Epub Sep 14, 2020. ISSN 1870-249X.