1. Echocardiographic contrast studies: initial experience;Seward,1975
2. Echocardiography;Felgenbaum,1981
3. Simultaneous contrast imaging of the left ventricle by two-dimensional echocardiography and standard ventriculography;Barrett;Clin Cardiol,1982
4. Contrast echocardiography: pulmonary transmission and myocardial perfusion imaging using surfactant stabilized microbubbles (abstr);Bommer;Circulation,1981
5. Contrast echocardiography for the detection of myocardial perfusion abnormalities (abstr);Armstrong;Circulation,1981