A. K. Jha, R. K. Roy, and C. S. Jha, “Stability and Related Thermodynamics of Chelation of Fe(II), Co(II), Ni(II) and Cu(II) Metal Ions with Diacetyl-bis-(4-methoxybenzoylhydrazone)”, ajc, vol. 8, no. 4, pp. 605–609, Mar. 2010.