Sall, M. L., A. K. Diaw, D. Gningue-Sall, M. A. Oturan, and J.-J. Aaron. “Highly Sensitive Detection of Cr(VI), Pb(II) and Cd(II) Ions by a New Fluorescent Sensor Based on 4-Amino-3-Hydroxynaphthalene Sulfonic Acid-Doped Polypyrrole”. Macedonian Journal of Chemistry and Chemical Engineering, vol. 39, no. 2, Oct. 2020, pp. 139-51, doi:10.20450/mjcce.2020.1978.