1. Non-invasive Techniques for Assessment of Atherosclerosis in Peripheral, Carotic and Coronary Arteries;Levy,1982
2. Clinical need for non-invasive assessment of atherosclerotic lesions in coronary arteries;Dodge,1982
3. Non-invasive Techniques for the Assessment of Atherosclerosis in Peripheral, Carotid and Coronary Arteries,1982
4. Time delay spectrometer;Heyser,;US Patent No. 3 466 652,1969
5. Method and apparatus for delay analysis for energy transmitted through a medium;Heyser,;US Patent No. 4 279 019,1981