Lokhande, R.S., et al. “P-Chloroisonitroso Acetophenone Thiosemicarbazone As an Extractive Reagent for the Spectrophotometric Determination of Zn(II)”. Asian Journal of Chemistry, vol. 17, no. 4, June 2016, pp. 2335-42, https://asianpubs.org/index.php/ajchem/article/view/13986.