Ni(II) Complex of (3,3-Dimethyl-7-Oxo-6-(2-Phenylacetamido)-4-Thia1-Azabicyclo[3.2.0]heptane-2-Carboxylic Acid : Synthesis, Characterization and Antibacterial Activities. Commun. Phys. Sci 2020, 5 (1), 14-23.