1. Handbook of congenital malformations;Rubin,1967
2. The urachus: its anatomy, histology, and development;Begg;J Anat,1930
3. Abnormalities of the lower urinary tract;Lattimer,1969
4. Infected urachal cysts;Brodie;Am J Surg,1945
5. Infected urachal cyst;Tauber;J Uro,1966