Qiao, Jun-Qin, Jia-Hui Zhao, Wei-Qun Zhou, and Hong-Zhen Lian. “Synthesis and Quality Control of 3,3’-Diamino Diphenyl Sulfone by High Performance Liquid Chromatography”. Asian Journal of Chemistry 26, no. 16 (August 4, 2014): 5015–5020. Accessed July 22, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_17_18.