Keyvanfard, Mohsen. “Kinetic-Catalytic Spectrophotometric Determination of Vanadium(V) Using the Oxidation of Pyronin G by Bromate”. Asian Journal of Chemistry, vol. 21, no. 2, Mar. 2010, pp. 983-8, https://asianpubs.org/index.php/ajchem/article/view/18779.