1. Standardization of spirometry with special emphasis in field testing. Occupational lung disease. Research approaches and methods;Gardner,1981
2. Dynamic BTPS correction factors for spirometric data;Hankinson;J Appl Physiol,1983
3. Spirometry—what paper speed;Gardner;Chest,1983
4. The diffusion of gases through the lungs of man;Krogh;J Physiol,1914
5. Reproducibility of pulmonary function tests under laboratory and field condition;Love;Br J Ind Med,1980