1. Analysis of kavalactones from Piper methysticum (kava-kava);Bilia;Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences,2004
2. Center for Drug Evaluation and Research. Guidance for Industry, Bioanalytical Method Validation. US Department of Health and Human Services Food and Drug Administration, 2001.
3. Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Kava-containing dietary supplements may be associated with liver injury, 25 March 2002). Available at: http://www.cfsan.fda.gov/∼dms/addskava.html. Accessed 18 June 2005.
4. Hepatic toxicity possible associated with kava-containing products-United States, Germany, and Switzerland, 1999-2002;Centers for Disease Control and Prevention;Journal of the American Medical Association,2002
5. Herb Research Foundation: Boulder, Co;Dentali;Herb Safety Review: Kava,1997