1. Nd-YAG laser in lung cancer;Gelb;West J Med,1984
2. Laser in treatment of lung cancer;Gelb;Chest,1984
3. Nd-YAG laser treatment of tracheal stenosis;Gelb;West J Med,1984
4. Questionnaire on Respiratory Symptoms;Medical Research Council,1966
5. The clinical evaluation of chemotherapeutic agents in cancer;Karnofsky,1948