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2. A procedure for using peak expiratory flow rate data to increase the predictability of asthma episodes;Taplin, P.S.; Creer, T.L.;Jf Asthma Res,1978
3. Can patients keep their own peak flow records reliably?;Hetzel, M.R.; Williams, I.P.; Shakespeare, R.M.;Lancet,1979
4. American Thoracic Society. Standardization of spirometry;Am Rev Respir Dis,1987
5. Evaluating commercially available spirometers;Gardner, R.M.; Hankinson, J.L.; West, B.J.;Am Rev Respir Dis,1980