Mezaal, Elham Nghaimesh, Kawther Ahmad Sadiq, Asmaa Nihad Zaki, and Rasmia Mahmood Rumez. 2017. “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 30 (1):96-106. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1063.