Cheng, Chunsheng, Zhenyun Wei, and Xiaohua Ma. “Synthesis of 2-Nitro-4-Methylsulfonylbenzoic Acid”. Asian Journal of Chemistry 27, no. 10 (June 22, 2015): 3559–3563. Accessed June 2, 2024. https://asianpubs.org/index.php/ajchem/article/view/27_10_9.