1. Normal and anomalous development of the urogenital system;Park,2002
2. Embryology of the Genitourinary system;Tanagho,2004
3. Triorchidism with torsion;Crawford;Br J Urol,1989
4. Urologic Surgery;Olumi,2004
5. Polyorchidism : causation and management (letter;O´sullivan;Postgrad Med J,1995