1. Echocardiography: Where are we now are where are we going?;Weyman;(Editorial) Amer J Med,1976
2. Use of echocardiography in evaluating left ventricular function. Second World Congress on Ultrasonics in Medicine;Feigenbaum;Excerpta Medica,June 1973
3. A sector scanner for real-time. Two-dimensional echocardiography;Griffith;Circulation,1974