Narain, Gopal, S. Sufal Kumar Naidu, and Jai Kumar Jain. 2010. “Characterization of Some Cobalt(II) Complexes Derived from Heterocyclic Ligands 3-Methyl-4-Nitro-1- (para-Nitrophenyl)-5-Pyrazole and Imidazoles ”. Asian Journal of Chemistry 4 (4):680-83. https://asianpubs.org/index.php/ajchem/article/view/25132.