P. S. Bharadwaj and H. Naik, “Use of 2-Hydroxy-4-Chloro-5-Methylacetophenone Oxime as a Spectrophtometric Reagent for Co(II), Ni(II) and Cu(II): Their Sequential Extraction and Determination in the Mixtures and Alloys”, ajc, vol. 11, no. 1, pp. 45–48, Mar. 2010.