1. Chevallier A (1996) The Encyclopedia of Medicinal Plants. London: Dorling Kindersley Publishing Inc., p. 54.
2. Chandler RF, Hooper SN, Harvey, MJ (1982) Ethnobotany and phytochemistry of yarrow, Achillea millefolium, Compositae. Econ Bot 36(2): 203–223.
3. Small E, Catling PM (1999) Canadian Medicinal Crops. NRC Research Press, pp. 7–12.
4. Duke JA (1992) Chemicals and their biological activities. In: Achillea millefolium L. (Asteraceae)—Milfoil, Yarrow, Dr. Duke’s Phytochemical and Ethnobotanical Databases: Online Internet, http://((www.ars-grin.gov(cgi-bin(duke(farmacy2.pl (date of access, Feb. 15, 2002).
5. Lawrence BM (1984) Progress in essential oils. Perfumer Flavorist 9(4): 37–48.