M.MITTAL , MRS., and Keemti Lal. “Stepwise Stability Constants of Metal Complexes of 2’ -Hydroxy-4’ ,5’ -Dimethyl-4-Chlorochalcone Oxime”. Asian Journal of Chemistry, vol. 1, no. 4, June 2010, pp. 413-4, https://asianpubs.org/index.php/ajchem/article/view/25432.