Y. Bogale Zemede, D. Nithyakalyani, and S. Ananda Kumar, “Synthesis, Characterization and Antimicrobial Properties of Some Transition Metal Complexes with NS-Chelating Schiff Base Ligand Incorporating Thiophene and Sulfonamide Moieties”, ajc, vol. 27, no. 3, pp. 941–948, Jan. 2015.