Kahar, P.A., and K.K. Desai. “Use of 2-Hydroxy-4-Isopropoxypropiopenone Oxime As a Spectrophotometric Reagent for Iron ”. Asian Journal of Chemistry, vol. 10, no. 4, Mar. 2010, pp. 910-4, https://asianpubs.org/index.php/ajchem/article/view/23749.