1. Wichtl M. Herbal Drugs and Phytopharmaceuticals. Boca Raton, FL: CRC Press, 1994, 102-3.
2. Didry N, Pinkas M. A propos du Buchu. Plantes Méd et Phyothér 1982;16:249-52.
3. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. New York: John Wiley and Sons, 1996, 104-5.
4. Blumenthal M, Busse WR, Goldberg A, et al. (eds). The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Austin: American Botanical Council and Boston: Integrative Medicine Communications, 1998, 317.
5. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. New York: John Wiley and Sons, 1996, 104-5.
6. Gruenwald J, Brendler T, Jaenicke C, et al. (eds). PDR for Herbal Medicines. Montvale, NJ: Medical Economics, 1998, 686-7.
7. Simpson D. Buchu--South Africa's amazing herbal remedy. Scott Med J 1998;43:189-91 [review]
8. Blumenthal M, Busse WR, Goldberg A, et al. (eds). The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Austin: American Botanical Council and Boston: Integrative Medicine Communications, 1998, 317.
9. Bradley PR (ed). British Herbal Compendium, vol 1. Bournemouth, England: British Herbal Medicine Association, 1992, 43-5.