J. Jarad, Amer, Dhafir T. A. Alheetimi, Sumayha M. Abass, and Rasha A. Hashim. 2017. “Synthesis, Characterization and Spectral Studies of Y(III), La(II) and Rh(III) Complexes With 2,4-Dimethyl-6-(4-Nitro-phenylazo)Phenol ”. Ibn AL-Haitham Journal For Pure and Applied Sciences 29 (1). https://jih.uobaghdad.edu.iq/index.php/j/article/view/50.