JAYASHREE, B.S., BHIMANNA K. KUPPAST, and K.N. VENUGOPALA. 2010. “Synthesis, Characterization and Antimicrobial, Antioxidant Properties of Some Benzopyrone Derivatives”. Asian Journal of Chemistry 19 (2):1415-22. https://asianpubs.org/index.php/ajchem/article/view/20264.