| - | Gfeller R.W. & Messonnier S.P. (2004) Small animal toxicology and poisonings. Mosby, Inc., pp. 183-184 |
| - | Gwaltney-Brant S.M. (2013) Miscellaneous indoor toxicants, Hops. In: Small Animal Toxicology. 3rd edition. Peterson M.E., Talcott P.A., W.B. Saunders Company, Philadelphia, pp. 302-303 |
| - | Roth L., Daunderer M. & Kormann K. (1994) Giftpflanzen - Pflanzengifte. 4. Auflage. Nikol Verlagsgesellschaft mbH & Co. KG, Hamburg, pp. 405-406 |
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