Jesupriya Poornakala S., Padmini T., Banumathi P., Parvathi S., and Sundaram SP, “Effect of different cooking methods on the antioxidant properties of methanolic extract of beetroot (Beta vulgaris L.)”, Int. J. Res. Pharm. Sci., vol. 3, no. 4, pp. 572–578, Nov. 2012.