Zabeen, Raziya, A.K. Goswami, and D.N. Purohit. 2010. “3-Hydroxy-3-Methyl-1-O-Carboxy Phenyl Triazene: A New Reagent for Spectrophotometric Determination of Palladium ”. Asian Journal of Chemistry 6 (3):709-12. https://asianpubs.org/index.php/ajchem/article/view/24640.