(en) V. Steenkamp, M. C. Gouws, M. Gulumian, E. E. Elgorashi, J. van Staden, « Studies on antibacterial, anti-inflammatory and antioxidant activity of herbal remedies used in the treatment of benign prostatic hyperplasia and prostatitis », Journal of Ethnopharmacology, vol. 103, no 1, , p. 71–75 (PMID16122891)