Babu1, K., and K. Tharini2. “Synthesis and Biological Studies of Novel Coumarin Derivatives Comprising Azo Functional Group”. Asian Journal of Chemistry 29, no. 1 (October 29, 2016): 187–190. Accessed November 22, 2024. https://asianpubs.org/index.php/ajchem/article/view/29_1_39.