1. Awang DVC (1997) Quality control and good manufacturing practices: safety and efficacy of commercial herbals. Food Drug Law Inst 52:341–344
2. Bhat KKP (1995) Medicinal plant information databases. In: Non-wood forest products, vol 11. Medicinal Plants for Conservation and Health Care, Rome, Food and Agriculture Organization
3. Blumenthal M, Busse WR, Goldberg A, Gruenwald J, Hall T, Riggins CW, Rister RS (eds) (1998) The complete German commission E monographs: therapeutic guide to herbal medicines. American Botanical Council/Integrative Medicine Communications, Austin, TX/Boston, MA
4. ESCOP (1999) European Scientific Cooperative on phytotherapy: ESCOP monographs on the medicinal uses of plant drugs. Exeter, UK
5. Jellin JM (2002) Natural medicines comprehensive database (pharmacists letter/prescribers letter). Therapeutic Research Faculty, Stockton, CA.
https://scholar.google.com/scholar?q=Jellin+JM.+2002