RASIKA C. TORANE, et al. “In-Vitro Antioxidative Activity of Phenolic and Flavonoid Contents of Leaves of Medicinal Plant -Ehretia Laevis”. International Journal of Pharma and Bio Sciences, vol. 2, no. 1, Mar. 2011, pp. 810-5, https://ijpbs.net/index.php/journal/article/view/640.