C. P. . Varghese, C. Ambrose, V. R, P. N. Hui, and C. S. May, “Antioxidant Activity of Hydroalcoholic Extract of Labisa Pumila var. Alata, an Indigenous Plant of Malaysia”, Scopus Indexed, vol. 4, no. 2, pp. 1418–1422, Aug. 2011.