V. Mane, “Synthesis and Structural Characterization of Manganese(II), Iron(III), Cobalt(II) and Copper(II) Complexes of 3-[1-(3,4-Dihydro-6-methyl-2,4-dioxo-2H-pyran-3- yl)ethylideneamino]-benzoic Acid”, ajc, vol. 23, no. 3, pp. 1065–1068, Nov. 2010.