1. Ultrasound cardiography in mitral valve stenosis;Edler;American Journal of Cardiology,1967
2. Ultrasonic engineering in heart diagnosis;Hertz;American Journal of Cardiology,1967
3. Visualization of the excised human heart by means of reflected ultrasound or echography;Wild;American Heart Journal,1957
4. Die Registrierung von Herzwandbewegungen mit Hilfe des Ultraschall-Impulsverfahrens;Hertz;Acustica,1956
5. Ultrasono-tomography for the heart, great vessels and other mediastinal organs;Oka,1965