1. Double oesophagus;Ansell, G.; Edwards, F.R.;J. Fac. Radial. (Lond.),1958
2. Enterogenous cyst of oesophagus;Barlow, D.M.;Brit. J. Surg,1957
3. Duplication of the oesophagus;Borrie, J.;Ibid,1961
4. Diverticula and duplications of the intestinal tract;Bremer, J.L.;Arch. Path,1944
5. Double esophagus with carcinoma in one. Report of a case with autopsy;Butler, C.L.; Ende, M.;Arch. Path,1950