Bhuyan, Debajyoti. “Microwave-Assisted Efficient Synthesis of Spiropyridine Derivatives via Catalyst- and Solvent-Free One Pot Four Component Reaction”. Asian Journal of Chemistry 33, no. 1 (December 10, 2020): 103–107. Accessed May 2, 2024. https://asianpubs.org/index.php/ajchem/article/view/33_1_18.