Singh, R.A., and Anju Singh. “Kinetics and Mechanism of Rh(III) Catalyzed Oxidation of Fumaric Acid by Ce(IV) in Acidic Medium”. Asian Journal of Chemistry, vol. 18, no. 4, Mar. 2010, pp. 2868-72, https://asianpubs.org/index.php/ajchem/article/view/20700.