1. Replacement with fresh aortic valve homograft;Angell;Surgery,1967
2. Aortic valve replacement with autogenous tissue;Edwards;Ann. Thorac. Surg.,1969
3. Partial and Complete Reconstruction of the Mitral Valve with Pericardium;Edwards,1969
4. Mitral and aortic valve replacement with fascia lata on a frame;;Edwards;J. Thorac. Cardiovasc. Surg.,1969
5. Heart valve replacement with autologous fascia lata;Ionescu;Lancet,1969