Hasan, Hasan A. “Fluorescence, Biological Activity and Spectroscopic Studies of Azo-Linked Schiff Base Ligand Type (ONO) and Its Complexes With CrIII, CoII NiII and CdII Ions”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 30, no. 3, Dec. 2017, pp. 114-29, https://doi.org/10.30526/30.3.1607.