1. Urachus and umbilical fistulae;Begg;Surg., Gynec. & Obst.,1927
2. Patent urachus: review of a case;Cherry;J. Urol.,1950
3. Patent urachus;Geist;Am. J. Surg.,1952
4. Cyst of patent urachus;Getz;U. S. Armed Forces M. J.,1950
5. Patent urachus with urinary tuberculosis;McClelland;J. Urol.,1947