SAHU, K., et al. “Complexes of Copper(II), Nickel(II) and Cobalt(II) withBis(2-Hydroxyimino-1-Phenylpropylidene)-1,2-Diaminobenzene”. Asian Journal of Chemistry, vol. 21, no. 2, June 2010, pp. 1385-8, https://asianpubs.org/index.php/ajchem/article/view/18837.