Neelamma, M., et al. “Synthesis and Structural Studies on Transition Metal Complexes Derived from 1-(2- Thienyl)-1-Ethanole-1H-Benzimidazole-2-Yl-Hydrazone”. Asian Journal of Chemistry, vol. 18, no. 4, Mar. 2010, pp. 3060-4, https://asianpubs.org/index.php/ajchem/article/view/20754.