1. Embryology of the Ovary and Testis;Van Wagenen,1965
2. The development of the urogenital organs;Felix,1912
3. Desarrollo de la union uretero-vesical contribution al estudio de la disposicion muscular del ureter terminal;Ruano Gil;Arch. Exp. Urol.,1972
4. Anatomy and function of the ureteral sheath;Elbadawi;J. Urol.,1972
5. Human Embryology;Hamilton,1975