Hankinson, John L.; Odencrantz, John R.; Fedan, Kathleen B. (1 January 1999). "Spirometric Reference Values from a Sample of the General U.S. Population". American Journal of Respiratory and Critical Care Medicine. 159 (1): 179–187. doi:10.1164/ajrccm.159.1.9712108. PMID9872837. S2CID16197063.
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Hankinson, John L.; Odencrantz, John R.; Fedan, Kathleen B. (1 January 1999). "Spirometric Reference Values from a Sample of the General U.S. Population". American Journal of Respiratory and Critical Care Medicine. 159 (1): 179–187. doi:10.1164/ajrccm.159.1.9712108. PMID9872837. S2CID16197063.
Ghio A. J., Crapo R. O., Elliott C. G. (1990). "Reference Equations Used to Predict Pulmonary Functions". Chest. 97 (2): 400–403. doi:10.1378/chest.97.2.400. PMID2298065.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Hankinson, John L.; Odencrantz, John R.; Fedan, Kathleen B. (1 January 1999). "Spirometric Reference Values from a Sample of the General U.S. Population". American Journal of Respiratory and Critical Care Medicine. 159 (1): 179–187. doi:10.1164/ajrccm.159.1.9712108. PMID9872837. S2CID16197063.
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