Rai, H.C., and Vibha Kumari. 2010. “Binuclear Metal Complexes of 1-Hydroxy-5-Carboxylato-1,4-Diaza-2-Methyl-3-Phenyl-1,-3-Pentadiene With Bivalent Transition Metal Ions”. Asian Journal of Chemistry 7 (4):881-85. https://asianpubs.org/index.php/ajchem/article/view/24451.