1. Postmortem study of the technique of aortic valvulotomy in calcific aortic stenosis by quantitative examination of valvular function by perfusion;J. thorac. Surg,1958
2. The electrical pulse duplicator-its use in testing valve prostheses with special reference to the aortic and mitral valves;Barnard, C.N.; McKenzie, M.B.; de Villiers, D.R.;S. Afr. med. J,1959
3. A mechanical pulse duplicator for testing prosthetic mitral and aortic valves;Bjork, V.O.; Intonti, F.; Meissl, A.;Thorax,1962
4. Visualization of the function of human heart valves with an external pulse duplicator. Prosthetic Valves for Cardiac Surgery;Callaghan, J.C.; Willars, M.J.; Cardozo, D.,1961
5. A simple mechanical pulse duplicator for cinematography of cardiac valves in action;Davila, J.C.; Trout, R.G.; Sunner, J.E.; Glover, R.P.;Ann. Sutg,1956