Qiao, J.-Q., Zhao, J.-H., Zhou, W.-Q., & Lian, H.-Z. (2014). Synthesis and Quality Control of 3,3’-Diamino Diphenyl Sulfone by High Performance Liquid Chromatography. Asian Journal of Chemistry, 26(16), 5015–5020. https://doi.org/10.14233/ajchem.2014.16294