“New Tetra-Dentate Schiff Base Ligand N2O2 and Its Complexes With Some of Metal Ions: Preparation, Identification, and Studying Their Enzymatic and Biological Activities”. Baghdad Science Journal, vol. 19, no. 1, Feb. 2022, p. 0155, https://doi.org/10.21123/bsj.2022.19.1.0155.