1. M. Harrison, Groundcovers for the South, Pineapple Press Inc., Sarasota, Florida, 2006, p. 71.
2. W. T. Islam and A. A. Sleem, Bull. Fac. Pharm. Cairo Univ., 44, 105 (2006).
3. S. Gill, I. Barteczko, D. W. Migas, and Z. M. Stasiek, Herba Pol., 27, 341 (1981).
4. M. M. Salama, Z. A. Kandil, and W. T. Islam, Nat. Prod. Res., 26, 2057 (2012).
5. W. Zaugg, Plants of the Medicinal Garden, Fifth edition, Eissey Campus, Palm Beach, 2011, p. 17.