Gupta, S., Sharma, R., & Gupta, A. (2010). Studies on Cobalt (II) Complexes of 2, 9-Dimethyl- 1, 10-phenanthroline with Ligands Containing O-, N-and S- Donor-Atoms . Asian Journal of Chemistry, 4(2), 206–209. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/25027