1. Cardiac Diagnosis;Fowler,1968
2. Intracardiac phonocardiography in the diagnosis of congenital heart disease;Lewis;Pediatrics,1959
3. Intracardiac phonocardiography;Segal;Am J Cardiol,1964
4. Innocent murmurs;Tavel,1975
5. Diastolic murmurs in apparently normal children;Liebman;Circulation,1968