1. The mitral opening snap in the quantitative diagnosis of mitral stenosis;Bayer, O.; Loogen, F.; Wolter, H.H.;American Heart Journal,1956
2. A simple phonocardiographic formula for predicting left atrial pressure in mitral stenosis;Davies, J.P.H.;British Heart Journal,1967
3. Left heart studies in mitral stenosis with special reference to intracardiac phonocardiography;American Journal of Cardiology
4. Production of left atrial pressure from the second sound-opening snap interval;Oriol, A.; Palmer, W.H.; Nakhjavan, F.; McGregor, M.;American Journal of Cardiology,1965
5. The phonocardiogram in mitral valvular disease;Proctor, M.H.; Walker, R.P.; Hancock, E.W.; Abelmann, W.H.;American Journal of Medicine,1958