1. Ultrasonic evaluation of prosthetic valve motion;Johnson;Circulation,1970
2. Ultrasonic evaluation of prosthetic valve motion;Johnson;Circulation,1970
3. M-mode echocardiographic techniques and pattern recognition;Chang,1976
4. Echocardiography. A teaching atlas;Felner,1976
5. Wall motion characteristic of the right pulmonary artery in the suprasternal echocardiogram;Kasper;J Clin Ultrasound,1980