1. Critical factors in determining adequate pleural drainage in both the operated and nonoperated chest;Batchelder;Am Surg,1962
2. A comparative study of the physiology and physics of pleural drainage systems;Enerson;J Thorac Cardiovasc Surg,1966
3. Open pneumothorax: its relation to the treatment of empyema: war medicine;Graham;Am J Med Sci,1918
4. Drainage for empyema;Hewett;Br Med J,1876