1. Clinical type of chronic obstructive lung disease in London and Chicago;Burrows;Am Rev Respir Dis,1964
2. Breathlessness in pulmonary disease;Howell,1966
3. The effect of obstruction of breath on the ventilatory response to CO2;Cherniack;J Clin Invest,1956
4. The work of breathing and its relation to respiratory acidosis;Riley;Ann Intern Med,1954
5. Definitions and classification of chronic bronchitis, asthma and pulmonary emphysema. A statement by the American Thoracic Society;Am Rev Respir Dis,1962