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3. Echocardiographic studies of genesis of mitral diastolic murmurs;Fortuin, N.J.; Craige, E.;British Heart-Journal,1973
4. Echocardiographic studies of mitral valve motion. Genesis of the opening snap in mitral stenosis;Friedman, N.J.;American Heart_Journal,1970
5. Haemodynamic and sound events preceding first heart sound in mitral stenosis;Lakier, J.B.; Pocock, W.A.; Gale, G.E.; Barlow, J.B.;British Heart J'ournal,1972