@article{saint’pierre_queiróz_souza_gomes neto_1998,  title={Spectrophotometric Determination of Manganese in Steels by On-Line Electrochemical Oxidation},  volume={9},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50531998000200005},  DOI={10.1590/S0103-50531998000200005},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Saint’Pierre, Tatiana. D. and Queiróz, Roldão R.U. de and Souza, Ivan G. de and Gomes Neto, José A.},  year={1998},  month={Apr},  pages={145–150} }