1. Gray's Anatomy for Students by Richard Drake, Wayne Vogl and Adam Mitchell.
2. Pelvic Dysfunction in Men: Diagnosis and Treatment of Male Incontinence and Erectile Dysfunction by Grace Dorey, 2006.
3. Headache in the Pelvis, 4th Edition by David Wise and Rodney Anderson.
4. National Institute of Diabetes and Digestive and Kidney Diseases Pages on: Prostate Problems and Erectile Dysfunction