Mohd. Ali, H.; Abdul Halim, S. N.; P, S.; M. Zain, S.; Ismail, E. Synthesis and Biological Activities of Nickel(II) and Cadmium(II) Complexes of Chlorohydroxyacetophenone-Nitrobenzoylhydrazone: Mechanism for Formation of the Nickel(II) Complex. Malaysian J. Sci. 2006, 25, 99-105.