Hussain Reddy, K., and Y. Sreenivasulu. “Coordination Compounds With Biomimetic N2S2 Donor Ligands, II: Synthesis and Characterization of Group II-B Metal Complexes of Benzil Dithiosemicarbazone”. Asian Journal of Chemistry, vol. 6, no. 2, Mar. 2010, pp. 432-4, https://asianpubs.org/index.php/ajchem/article/view/24567.