Babu V.L., Ashoka, Shanaz Banu, Dhanapal R., Vrushabendra Swamy B.M., G.S. Kumar, and Sridhar Chandanam. 2010. “Free Radical Scavenging Activity of Betalaine of Beta Vulgaris”. Asian Journal of Chemistry 18 (4):3221-23. https://asianpubs.org/index.php/ajchem/article/view/20818.