lrshad Ahmad, M. A. Khan, and M. Athar, “PYRAZOLE AROYL HYDRAZONES AS LIGANDS-I 1,3-DIPHENYLPYRAZOLE- 4-CARBOXALDEHYDE BENZOYL HYDRAZONE AS LIGAND FOR METAL COMPLEXES”, Pakistan Journal of Scientific & Industrial Research, vol. 44, no. 5, pp. 268–272, Oct. 2001.