Shrivastava, Shobhit, and Dharmendra Ahuja. “Synthesis, Characterization and Antimicrobial Activity of Some Novel Mannich Bases of Indole-2,3-Dione”. Asian Journal of Chemistry, vol. 35, no. 5, Apr. 2023, pp. 1183-8, doi:10.14233/ajchem.2023.27738.