K. Agarwal, S. and Lal, M. 2010. Structural Investigations on Co(II), Ni(II) and Cu(II) Biligand Coordination Compounds with 7-Hydroxy-4-Phenyl-6-(α-Naphthyl)-Aminomethyl Coumarin as Primary and 4-Nitroso-1-Hydroxy-2-Naphthoic Acid As Secondary Ligand . Asian Journal of Chemistry. 10, 4 (Mar. 2010), 1051–1053.