Barrett, B. (1999).  Assessing the risks and benefits of herbal medicine:  an overview of scientific evidence.  Alternative Therapy of Health Medicine, 5(4), 40-49. 

Cauffield, J. S. (1999).  Dietary supplements used in the treatment of depression, anxiety, and sleep disorders.  Lippincotts Primary Care Practitioner, 3(3), 290-304.

Ernst, E. (1999).  Herbal medications for common ailments in the elderly.  Drugs Aging, 15(6), 423-8.

Fetrow, C. & Avila, J. (1999).  Professional's Handbook of Complementary & Alternative Medicines.  Springhouse, PA:  Springhouse Corporation. 

Klepser, T. B. (1999).  Unsafe and potentially safe herbal therapies.  American Journal of Health Systems Pharmacy, 56(2), 125-38.

Houghton, P. J. (1999).  The scientific basis for the reputed activity of Valerian.  Journal of Pharmacy Pharmacology, 51(5), 505-12. 

Kuhn, M. (1999).  Complementary therapies for health care providers.  Lippincott Williams & Wilkins. 

Jellin, J. M., Batz, F., Hitchens, K. (1999).  Pharmacist's Letter/Prescriber's Letter Natural Medicines Comprehensive Data Base.  Stockton, CA:  Therapeutic Research Faculty.

Plushner, S. L. (2000).  Valerian:  Valeriana officinalis.  American Journal of Health Systems Pharmacy, 57(4), 238-335.  

Rankin, E. (1999).  Managing the most common symptoms and related problems experienced during perimenopause.  Unpublished manuscript, Salisbury University. 

Schultz, V., Hubner, W. D., & Ploch, M. (1997).  Clinical Trials with phyto-psychopharmacological agents.  Phytomedicine, 4 (4), 379-387. 

Wagner, J., Wagner, M. & Hening, W. A. (1998).  Beyond benzodiazepines:  alternative pharmacologic agents for the treatment of insomnia.  American  Pharmacotherapy, 32 (6), 680-691.

Willey, L. B. (1995).  Valerian overdose:  a case report.  Veterinary and Human Toxicology, 37 (4), 364-365).