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- American Academy of Allergy, Asthma and Immunology.
- American Academy of Otolaryngology.
- Brinkhaus, B. Annals of Internal Medicine, February 2013.
- EPA.
- Chatzi, L. Thorax, August 2007.
- Lee, D. Clinical & Experimental Allergy, April 2004.
- Medical News Today.
- National Center for Complementary and Alternative Medicine: “Seasonal Allergies and Complementary Health Practices: What the Science Says.”
- National Institute of Environmental Health Sciences, National Institutes of Health.
- National Jewish Health.
- Natural Therapeutics Comprehensive Database: “Allergic Rhinitis.”
- Office of Dietary Supplements.
- James Sublett, MD, section chief of pediatric allergy, University of Louisville School of Medicine.
- University of Maryland Medical Center.
- University of Rochester Health Service.
- U.S. Department of Health and Human Services.
- Wilson, D. Phytotherapy Research, August 2010.
- Xiu-Min Li, MD, professor of pediatrics; director, Center for Chinese Herbal Therapy for Allergy and Asthma, Mount Sinai School of Medicine, New York.