1. Electronic sector scanning with ultrasonic beams;Somer,1969
2. Multiscan echocardiography. 1. Technical description;Bom;Circulation,1973
3. Real-time cross-sectional ultrasonic imaging of the heart using a linear array, multi-element transducer;King;J. Clin. Ultrasound,1973
4. A sector scanner for real time two-dimensional echocardiography;Griffith;Circulation,1974
5. Visualization of cardiac dynamics with real-time B-mode ultrasonic scanner (Abstr.);Eggleton;J. Clin. Ultrasound,1974