NEKOUEI, F.; PARHAM*, H. Flotation-Spectrophotometric Determination of Traces of Lead Ion. Asian Journal of Chemistry, [S. l.], v. 22, n. 1, p. 319–324, 2009. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/16650. Acesso em: 26 aug. 2024.