1. AdamsRP. 2007. Identification of essential oil components by gas chromatography/mass spectroscopy. Carol Stream, IL: Allured Publishing Co.
2. AllenDA, HatfieldG. 2004. Medicinal plants in folk tradition: an ethnobotany of Britain and Ireland. Portland, OR: Timber Press, Inc, ISBN 0-88192-638-8. An archive for botanical data. Available from: http://www.anarchive.it/anArchive/index.jsp.
3. BaytopT. 1999. Türkiye'de Bitkiler ile Tedavi Geçmisten Bugüne (Therapy with medicinal plants in Turkey-past and present). 2nd ed. Istanbul: Nobel Tip Basımevi; p. 373.
4. Chemical diversity of the contents from the secretory structures of Heracleum sphondylium subsp. Sphondylium