Guan, Liguo, Ling Xu, Yin Wang, and Zongrui Liu. “Preparation, Characterization of Supported Phosphotungstic Acid and Photocatalytic Degradation of Aqueous Methyl Orange”. Asian Journal of Chemistry 26, no. 16 (August 4, 2014): 4985–4987. Accessed July 22, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_17_12.