“Synthesis and Characterization of Some Mixed-Ligand Complexes Containing Azo Dye and 1,10-phenanthroline with CoII, ZnII, CdII and HgII Ions”, IHJPAS, vol. 28, no. 3, pp. 187–203, Mar. 2017, Accessed: May 04, 2024. [Online]. Available: https://jih.uobaghdad.edu.iq/index.php/j/article/view/152