1. Campbell EJM, Guz A. 1981 Breathlessness. In Hornbein TF (ed), Regulation of Breathing, unit 9, vol. 2. New York: Marcel Dekker, 1181–1192.
2. Davis CL. 1997. ABC of palliative care: breathlessness, cough and other respiratory problems. Br Med J 315:931–934.
3. Saunders C. 1967. The Management of Terminal Illness. London: Edward Arnold.
4. Muers MF. 1993. Palliation of symptoms in non-small cell lung cancer: a study by the Yorkshire Regional Cancer Organisation, Thoracic Group. Thorax 48:339–343.
5. Krech RL, Davis J, Walsh TD, Curtis EB. 1992. Symptoms of lung cancer. Palliat Med 6:309–315.