1. Duodenal atresia, stenosis and annular pancreas;Schnaufer,1986
2. Duodenal atresia with biliary anomalies and unusual gas pattern;Raine;J Pediatr Surg,1977
3. Description of a malformation of the duodenum;Boyd;Lancet,1845
4. Congenital duodenal diaphragm;Bill;Surgry,1954
5. Pancreatic annulus: A sign or a cause of duodenal obstruction?;Elliott;Can J Surg,1968