Kumar, Mithilesh, and A.K. Singh. 2010. “Synthesis and Characterization of Complexes of Cobalt(II), Nickel(II) and Copper(II) With 2-Pyrrolidene-M-Nitroaniline and 2-Pyrrolidene-P-Nitroaniline Schiff Bases and Their Biological Activity”. Asian Journal of Chemistry 10 (2):233-37. https://asianpubs.org/index.php/ajchem/article/view/23590.