Mohamed, M. H., and H. K. Dakhil. “Synthesis and Spectral Characterization of Some Metal Complexes Containing Azo Derived from 2-Aminobenzimidazole”. Al-Qadisiyah Journal of Pure Science, Vol. 19, no. 2, July 2017, pp. 86-96, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/182.