1. Beneke: Quoted by Gruenfeld, G. E. and Gray, S. H.10.
2. The Development of the Pulmonary Vein in the Domestic Cat;Brown;Anat. Rec.,1913
3. Anomalous Arteries to the Lung Associated With Congenital Pulmonary Abnormality;Bruwer;J. Thoracic Surg.,1950
4. Origin of the Pulmonary Vessels in the Chick. In Carnegie Institution of Washington: Contributions to Embryology. Washington;Buell;Carnegie Institution of Washington,1922
5. Carr, D. M.: Quoted by Cole, F. H., Alley, F. H. and Jones, R. S.7.