Bajpai, Shivam, Sunil Bhatia, Anil Kumar Bajpai, and Sarvesh Narain Asthana. “An Efficient Bentonite Clay Catalyzed Multicomponent Synthesis of Substituted Spirooxindoles in Water Ethanol Solvent System”. Journal of Drug Delivery and Therapeutics 14, no. 8 (August 15, 2024): 119–122. Accessed April 30, 2026. https://jddtonline.info/index.php/jddt/article/view/6754.