“The Spectrophotometric Determination of Samarium (III) With (l-2(2-Benzoinidazoly-AZO)-2-Hydroxy-3Naphthoic Acid”. 2017. Ibn AL-Haitham Journal For Pure and Applied Sciences 23 (3): 128-33. https://jih.uobaghdad.edu.iq/index.php/j/article/view/929.