1. Collected Essays, VIII. Discourses, Biological and Geological;Huxley,1894
2. Replacement of the mitral valve for mitral incompetence;Kirklin;Surgery,1972
3. Surgery for acquired valvular heart disease;Kirklin;N Engl J Med,1973
4. Surgery for acquired valvular heart disease;Kirklin;N Engl J Med,1973
5. Problems with mitral valve replacement;Kouchoukos,1973