1. Niewoehner DE. Anatomic and pathophysiological correlations in COPD. In: Baum GL, Crapo JD, Celli BR, et al, eds. Textbook of pulmonary diseases. Philadelphia: Lippincott-Raven, 1998: 823–42
2. Small Airways Dimensions in Asthma and in Chronic Obstructive Pulmonary Disease
3. Fletcher C, Peto R, Tinker C, et al. The natural history of chronic bronchitis and emphysema: an eight-year study of early chronic obstructive lung disease in working men in London. New York: Oxford Univ Press, 1976: 1–272
4. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease
5. Structural and inflammatory changes in COPD: a comparison with asthma.