1. Illustrated Human Embryology;Tuckmann-Duplessis,1974
2. Cryptorchidism;Hadziselimovic,1987
3. Testicular volume during early infancy;Cassorla;J Pediatr,1981
4. Clinical Pediatric Urology;Kelalis,1985
5. Testicular volumes of adolescents;Daniels;J Pediatr,1982