Singh Yadav, Rajeev. “Studies on Schiff Base Complexes of Cobalt(II) and Cadmium(II) Derived from Histidine With Acetylacetone”. Asian Journal of Chemistry, vol. 22, no. 4, Mar. 2010, pp. 2849-52, https://asianpubs.org/index.php/ajchem/article/view/11486.