1. On the capacity of the lungs, and on the respiratory function, with a view to establishing a precise. and easy method qf detecting disease by the spirometer;J, I.Hutchinson;Medico-chirurgical Transactions
2. European Coal and Steel Community recommendations. Bull Eur Physiopathol Respir 1983; 19(suppl 5)
3. American Thoracic Society statement. Evaluation of impairment/disability secondary to respiratory disease;Am Rev Respir Dis,1982
4. Assessment of ventilatory abnormality in the asymptomatic subject: an exercise in futility;Sobol, B.J.; Weinheimer, B.;Thorax,1966
5. A comparison of two definitions of abnormality on pulmonary outcome in epidemiologic studies;Oliver, L.C.; Eisen, E.A.; Sprince, N.L.;Am Rev Respir Dis,1986