1. Ueber das Verhalten des Oesophagus bei Herzvergröszerung;Kovacs;Wien. klin. Wschr.,1910
2. The course of the esophagus in health and in disease of the heart and great vessels;Evans,1936
3. L'oesophage en cardiologie;Segers;Acta cardiol.,1952
4. Cardiac mensuration by roentgenologic methods;Hilbish;Am. J. M. Sc.,1952
5. Angiocardiography;Dotter,1951