H. Mohd. Ali, S. N. Abdul Halim, S. P, S. M. Zain, and E. Ismail, “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., vol. 25, no. 1, pp. 99–105, Apr. 2006.