N. BHANDARI and . Vivekanand, “Polymeric Complex of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with Schiff Bases Derived from Hydroquinone bis-(Acetylhydrazide) and Aromatic Aldehydes”, ajc, vol. 19, no. 6, pp. 4225–4230, Mar. 2010.