1. Feverfew faces the future;Berry;Pharm J,1984
2. Feverfew: A Traditional Herbal Remedy For Migraine and Arthritis;Johnson,1984
3. Patients who chew chrysanthemum leaves;Johnson;MIMS Magazine,1983
4. Editorial, Feverfew—a new drug or an old wives remedy?;Lancet,1985
5. Efficacy of feverfew as prophylactic treatment of migraine;Johnson;Br Med J,1985