כף הזאב – Lycopus virginicus

De Smet P.A.G.M.Keller K, Hansel R, eds. Adverse Effects of Herbal Drugs, Vol 2. Berlin: Springer-Verlag; 1993. pp. 245–251.

Mills & Bone - Principles and practice of Phytotherapy. Modern Herbal Medicine, 2ed. Churchill Livingstone, 2013

Eiling R, Wieland V, Niestroj M. [Improvement of symptoms in mild hyperthyroidism with an extract of Lycopus europaeus (Thyreogutt® mono)]. Wien Med Wochenschr. 2013 Feb;163(3-4):95-101. doi: 10.1007/s10354-012-0167-z. Epub 2012 Dec 18.

Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Austin: American Botanical Council; 1998. pp. 98–99.

Vonhoff, C., Baumgartner, A., Hegger, M., Korte, B., Biller, A., and Winterhoff, H. Extract of Lycopus europaeus L. reduces cardiac signs of hyperthyroidism in rats. Life Sci 2-2-2006;78(10):1063-1070.

Brinker F. Herb Contraindications and Drug Interactions, 4th ed. Sandy (OR): Eclectic Medical Publications; 2010

McGuffin M, Hobbs C, Upton R, Goldberg A (ed.). Botanical Safety Handbook. CRC Press, Boca Raton, 1997

Gruenwald J, Brendler T, Jaenicke C (eds.). PDR for Herbal Medicines. Medical Economics Co., Inc., Montvale, NJ, 1998

Brinker F. Inhibition of endocrine function by botanical agents I. Boraginaceae and Labiatae. J. Naturop. Med., 1:10-18, 1990

Winterhoff H, Gumbinger H-G, Vahlensieck U, et al. Endocrine effects of Lycopus europaeus L. following oral application. Arzneim.-Forsch., 44(1):41-45, 1994

Kohrle J, Auf‟mkolk M, Winterhoff H, et al. Iodothyronine deiodinases: inhibition by plant extracts. Acta Endocrin., 240:15-16, 1981

Auf‟mkolk M, Kohrle J, Gumbinger H, et al. Antihormonal effects of plant extracts: iodothyronine deiodinase of rat liver is inhibited by extracts and secondary metabolites of plants. Horm. Metabol. Res., 16:188-192, 1984