Joshi, K. et al. 2010. Synthesis, Characterization and Antimicrobial Activity of Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) Complexes of Schiff Bases Derived From 2-Amino-4(4’-methylphenyl)- thiazole and Substituted 4-Acetyl-1-phenyl-3-methyl-2-pyrazolin-5-ones. Asian Journal of Chemistry. 22, 10 (Jul. 2010), 7706–7712.