Monographs on the medicinal uses of plant drugs. Exeter, UK: European Scientific Co-op Phytother, 1997.
Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
Tyler VE. Herbs of Choice. Binghamton, NY: Pharmaceutical Products Press, 1994.
Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
Schulz V, Hansel R, Tyler VE. Rational Phytotherapy: A Physician's Guide to Herbal Medicine. Terry C. Telger, transl. 3rd ed. Berlin, GER: Springer, 1998.
Wichtl MW. Herbal Drugs and Phytopharmaceuticals. Ed. N.M. Bisset. Stuttgart: Medpharm GmbH Scientific Publishers, 1994.
Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
Young DS. Effects of Drugs on Clinical Laboratory Tests 4th ed. Washington: AACC Press, 1995.
Nusko G, Schneider B, Schneider I, et al. Anthranoid laxative use is not a risk factor for colorectal neoplasia: results of a prospective case control study. Gut 2000;46:651-5.
Chakurski I, Matev M, Koichev A, et al. [Treatment of chronic colitis with an herbal combination of Taraxacum officinale, Hipericum perforatum, Melissa officinaliss, Calendula officinalis and Foeniculum vulgare]. Vutr Boles. 1981;20:51-4.
Siegers, C. P., Hertzberg-Lottin, E., Otte, M., and Schneider, B. Anthranoid laxative abuse--a risk for colorectal cancer? Gut 1993;34(8):1099-1101.
van Gorkom, B. A., de Vries, E. G., Karrenbeld, A., and Kleibeuker, J. H. Review article: anthranoid laxatives and their potential carcinogenic effects. Aliment.Pharmacol Ther 1999;13(4):443-452.
Willems, M., van Buuren, H. R., and de, Krijger R. Anthranoid self-medication causing rapid development of melanosis coli. Neth.J Med 2003;61(1):22-24.
Matev, M., Chakurski, I., Stefanov, G., Koichev, A., and Angelov, I. [Use of an herbal combination with laxative action on duodenal peptic ulcer and gastroduodenitis patients with a concomitant obstipation syndrome]. Vutr.Boles. 1981;20(6):48-51.
De Kort H, Mergeay J, Jacquemyn H, Honnay O. Transatlantic invasion routes and adaptive potential in North American populations of the invasive glossy buckthorn, Frangula alnus. Ann Bot. 2016;118(6):1089-1099.