Pathak, Vishal, et al. “Synthesis and Characterization of Thioamide Bands in Cr(III) and V(V) Complexes With O- and N-Donor Ligands”. Asian Journal of Chemistry, vol. 13, no. 1, Mar. 2010, pp. 123-7, https://asianpubs.org/index.php/ajchem/article/view/22538.