1. Ultrasound Diagnosis;Somer;Progress Report Institute of Medical Physics TNO,1968
2. Present State of an Ultrasonic Cross-section Procedure with Rapid Image Rate;Pätzold;IEEE Trans. Biomed. Engng,1970
3. Cardiac Ultrasonography: A Review of Current Applications;Gramiak;Radiol. Clin. N. Am.,1971
4. A New Ultrasound Imaging Technique Employing Twodimensional Electronic Beam Steering;Thurstone,1974
5. Historical Review of Echo Instrumentation;Wells,1979