1. Improved results in 336 patients with the isolated mitral Beall valve replacement;Nichols;Chest,1972
2. An improved mitral valve prosthesis;Beall;Ann Thorac Surg,1973
3. The preparation, structure, and properties of pyrolytic carbon;Bokros,1969
4. Applications of pyrolytic carbon in artificial heart valves: a status report;Bokros,1971
5. Beall AC Jr: Personal communication, July 17, 1973