Desai, M.J., and K.K. Desai. 2010. “Spectrophotometric Determination of Copper(II) and iron(III) With 2,4-Dihydroxy-5-Bromaocetophenone Thiosemicarbazone”. Asian Journal of Chemistry 11 (4):1313-16. https://asianpubs.org/index.php/ajchem/article/view/23486.