1. Embryology for surgeons;Gray, S.W.; Skandalakis, J.E.,1972
2. Rickham PP. The incidence and treatment of ectopia vesicae. Proc R Soc Med 1961;54:389-92.
3. Exstrophy of the bladder: report of 158 cases;Higgins, C.C.;Am Surg
4. Pediatric surgery
5. The incidence of malformations in Birmingham, England, 1950-1959;Leck, I.; Record, R.G.; McKeown, T.; Edwards, J.H.;Teratology,1968