American Thoracic Society: Dyspnea. Mechanisms, assessment, and management:a consensus statement. Am J Respir Crit Care Med 159 : 321-340, 1999
Chan K-S, Tse DMW, Sham MMK, et al : Palliative medicine in malignant respiratory diseases. Hanks G, Cherny NI, Christakis NA, et al eds : Oxford Textbook of Palliative Medicine. 4th ed, p.1107-1131, Oxford University Press, Oxford, 2009
Reuben DB, Mor V : Dyspnea in terminally ill cancer patients. Chest 89 : 234-236, 1986