Hemalatha, K., and D. Ilangeswaran. “Synthesis and Characterization of Piperidin-4-One Derivatives Using Green Solvent”. Asian Journal of Chemistry 32, no. 4 (February 25, 2020): 981–984. Accessed May 8, 2024. https://asianpubs.org/index.php/ajchem/article/view/32_4_41.