1. Minutes of the Board of Thoracic Surgery and the American Board of Thoracic Surgery: 10-2-48, 5-26-54, 10-12-56, 5-14-60, 10-22-62, 5-13-66, 10-14-66, 10-19-80, 4-4-87.
2. A time for assessment;Paulson;J Thorac Cardiovasc Surg,1981
3. General Thoracic Surgery in Cardiothoracic Surgery: The Search for Balance
4. A surgeon and something more;Johnson;J Thorac Cardiovasc Surg,1963
5. Zustand der Chirurgie auf Grund einer Umfrage aus den Jahren 1986/87;Hempel;Chirurgie,1989