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2. The normal and abnormal apex cardiogram: its physiologic variation and its relation to intracardiac events;Benchimol, A.; Dimond, E.G.;American Jrournal of Cardiology,1963
3. The value of the apexcardiogram as a reference tracing in phonocardiography;Benchimol, A.; Dimond, E.G.; Carson, J.C.;American Heart Journal,1961
4. Duration of phases of left ventricular systole using indirect methods. I: normal subjects;Fabian, J.; Epstein, E.J.; Coulshed, N.;British Hesrt Journal,1972
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