1. Congenital obstruction of the posterior urethra;Young;J. Urol.,1919
2. The Surgery of Infancy and Childhood;Gross,1953
3. Congenital Malformations of the Rectum, Anus and Genito-urinary Tracts;Stephens,1963
4. The Lower Urinary Tract in Childhood;Kjellberg,1957
5. Diagnosis and treatment of congenital urethral valves;Nesbit;J. Mich. Med. Soc.,1951