Parikh, K., Patel, R., & Patel, K. (2010). 2-Hydroxy-4-n-butoxy-5-bromo propiophenone Thiosemicarbazone as Spectrophotometric Reagent for Iron. Asian Journal of Chemistry, 22(4), 2805–2810. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/11480