Jose, C.V., and T. Joy Anto. “Characterization and CNS Depressant Studies on Complexes of Mn(II), Co(II) and Ni(II) With 2-(Thiophene-2-Formylimino)Benzimidazole”. Asian Journal of Chemistry, vol. 22, no. 4, Mar. 2010, pp. 2495-00, https://asianpubs.org/index.php/ajchem/article/view/11434.