1. M. K. Pillai, T. K. H. Benny, and Y. Daiwen, Phytochemistry, 66 (19), 2304 (2005).
2. M. K. Pillai, Y. Daiwen, H. Annie, and T. K. H. Benny, Med. Chem., 3 (2), 121 (2007).
3. A. Intisar, L. Zhang, H. Luo, J. B. Kiazolu, R. Zhang, and W. Zhang, Afr. J. Trad. Complement Altern. Med., 10 (1), 53 (2013).
4. F. Couplan and J. A. Duke, The Encyclopaedia of Edible Plants of North America, Keats Publishing Inc., New Canaan, Connecticut, 1998, p.128.
5. D. E. Moerman, Native American Food Plants: an Ethnobotanical Dictionary, Timber Press Inc., Portland, Oregon, 1998, p. 189.