K. Agarwal, S.; Lal, M. 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 . ajc 2010, 10, 1051-1053.