M. S. Aljahdali, A. A. El-Sherif, R. H. Hilal, and A. T. Abdel-Karim, “Mixed bivalent transition metal complexes of 1,10-phenanthroline and 2-aminomethylthiophenyl-4-bromosalicylaldehyde Schiff base: Spectroscopic, molecular modeling and biological activities”, Eur. J. Chem., vol. 4, no. 4, pp. 370–378, Dec. 2013.