Mohammed, Abdul-Halim A-K, and Safaa Rasheed Yasin. “Kinetics of Sodium Tungstate Catalyzed Oxidation of Maleic Acid by Hydrogen Peroxide”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 2, no. 2, June 2001, pp. 15-20, https://doi.org/10.31699/IJCPE.2001.2.3.