1. The health consequences of smoking: chronic obstructive lung disease;US Surgeon General,1984
2. Epidemiology of chronic obstructive pulmonary disease;Sherrill;Clin Chest Med,1990
3. Management of chronic obstructive pulmonary disease;Ferguson;N Engl J Med,1993
4. Process of smoking cessation;Prochaska;Clin Chest Med,1990
5. Pharmacologic therapy of obstructive airway disease;Ziment;Clin Chest Med,1990