A. Jaleel, U.C, et al. “Analytical, Classical Mechanical and Semi Empirical Study of Transition Metal Complexes of (2E,2’E)-2,2’-(5,5-Dimethylcyclohexane- 1,3-diylidene)dihydrazine Carboxamide”. Asian Journal of Chemistry, vol. 21, no. 3, Mar. 2010, pp. 2383-9, https://asianpubs.org/index.php/ajchem/article/view/18740.