G.ALAGUMANI VASAGAM, et al. “In Vitro Antioxidant Potential of Tuberous Root of Methanolic Extract of Ipomoea Digitata (Linn.) ”. International Journal of Pharma and Bio Sciences, vol. 1, no. 2, June 2010, pp. 1-5, https://ijpbs.net/index.php/journal/article/view/74.