DARWEESH, S. A.; HAMMODI, A. S.; MAHMMOD, R. M. A new Spectrophotometric Method For The Determination of La (III) With 3-Hydroxy -4-(2-hydroxyPhenyl azo) Naphthalene -1- Sulfonic Acid. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 24, n. 1, 2016. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/869. Acesso em: 26 mar. 2025.