M. El-Ajaily, A. Maihub, and S. Filog, “Synthesis and Characterization of Some Co(II), Ni(II) and Cu(II) Mixed Ligand Chelates of 8-Hydroxyquinoline, Anthranilic Acid and o-Aminophenol”, ajc, vol. 18, no. 4, pp. 2421–2426, Mar. 2010.