Hausen, BM., and PE. Osmundsen. 1983. “Contact Allergy to Parthenolide in Tanacetum Parthenium (L.) Schulz-Bip. (feverfew, Asteraceae) and Cross-Reactions to Related Sesquiterpene Lactone Containing Compositae Species”. Acta Dermato-Venereologica 63 (4):308-14. https://doi.org/10.2340/0001555563308314.