A. Kumar, S. Das, and R. Dhakarey, “Studies on Mn(II), Co(II), Ni(II) and Cu(II) Complexes of Schiff Bases Derived from Furfurylimine with Benzaldehyde and Phenyl Glyoxal”, ajc, vol. 20, no. 7, pp. 5019–5026, Mar. 2010.