MEZAAL, E. N.; SADIQ, K. A.; ZAKI, A. N.; RUMEZ, R. M. Spectrophotometric Determination of Cu(II) by Complex with Ethyl Cyano(2-Methyl Carboxylate Phenyl Azo Acetate) (ECA). Ibn AL- Haitham Journal For Pure and Applied Sciences, [S. l.], v. 30, n. 1, p. 96–106, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1063. Acesso em: 23 may. 2022.