1. The value of the apex cardiogram as a reference tracing in phonocardiography;Benchimol, A.; Dimond, E.G.; Carson, J.C.;American Heart Journal,1961
2. Verification of systolic time intervals and the isovolumic contraction time from the apex cardiogram by micromanometer catheterization of the left ventricle and aorta;Bush, C.A.; Lewis, R.P.; Leighton, R.F.; Fontana, M.E.; Weissler, A.M.;Circulation,1970
3. Measurement of instantaneous left ventricular dimension and filling rate in man, using echocardiography;Gibson, D.G.; D, Brown;British Heart Journal,1973
4. Measurement of peak rates of left ventricular wall movement in man: comparison of echocardiography with angiography;Gibson, D.G.; Brown, D.J.;British Heart Journal,1975
5. Continuous assessment of left ventricular shape in man;Gibson, D.G.; Brown, D.J.;British Heart Journal,1975