1. Duplications of the foregut;Baar, H.S.; d'Abreu, A.L.;Brit. J. Surg,1949
2. A case of congenital oesophageal diverticulum, lower accessory lobe, and oesophagobronchial fistula;Davidson, J.S.;Ibid,1956
3. Eppinger, H. (1904). Krankheiten der Lungen. A. Angeborene Krankheiten. Ergebn. allg. Path. path Anat., 1902, 8, Pt 1, p. 267
4. The development of the lungs;Flint, J.M.;Amer. J. Anat,1906
5. Malformations of the lung;Gruenfeld, G.E.; Gray, S.H.,1941