KUMAR, D., et al. “Theoretical Investigation of IR and Geometry of the S-Benzyl-Β-N-(2-furylmethylketone)dithiocarbazate Schiff Base by Semi-Empirical Methods”. Asian Journal of Chemistry, vol. 19, no. 5, Mar. 2010, pp. 3703-15, https://asianpubs.org/index.php/ajchem/article/view/13270.