1. Developmental Anatomy. A Textbook and Laboratory Manual of Embryology;Arey,1954
2. The urachus: its anatomy, histology, and development;Begg;J. Anat.,1930
3. Family study of vesicoureteral reflux;Bredin;J. Urol.,1975
4. Ureteral ectopia: a review of the literature and two case reports;Burford;J. Urol.,1949
5. Urology;Campbell,1963