Subhadradevi, V., Asokkumar, K., Umamaheswari, M., Sivashanmugam, A. and Sankaranand, R. (2010) “In vitro antioxidant activity of Vetiveria zizanioides root extract”, Tanzania Journal of Health Research, 12(4), pp. 265–271. doi: 10.4314/thrb.v12i4.59314.