Paira, Moumita. “A Useful Methods of Direct Sulfenylation at the 3-Position of Indoles Employing Various Sulfenylating Agents: A Review”. Asian Journal of Chemistry 34, no. 6 (May 18, 2022): 1347–1353. Accessed May 17, 2024. https://asianpubs.org/index.php/ajchem/article/view/34_6_3.