Bismuth/hydroxyapatite-modified carbon screen-printed electrode for heavy-metal ion detection in aqueous mediaAamir Amanat Ali Khan, Huma Ajab, Asim Yaqub and Mohd Azmuddin AbdullahE3S Web Conf., 76 (2019) 02001DOI: https://doi.org/10.1051/e3sconf/20197602001