1. Barry MJ, Fowler FJJr, O’leary MP (1992) The American Urological Associations symptom index for benign prostatic hyperplasia. J Urol 148: 1549–1557
2. Roehrborn CG, BPH (2003) Epidemiology and natural history, AUA Postgraduate Course 2003–12–07
3. Roehrborn GC (1996) Editorial: fine tuning the indication for prostatectomy. J Urol 155: 203–205
4. McConnell J, Barry M, Bruskewitz R (1994) Benign prostatic hyperplasia. Diagnosis and treatment Clinical practice guidlines, nr. 8, AHCRP publication 94–0582. Rockville MD, Agency for health services
5. Mc Neal J (1988) Normal histology of the prostate. Am. J. Surg. Pathol.12: 61-633