maximal expiratory flow-volume curves

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The Concave Shape of the Forced Expiratory Flow-Volume Curve in 3 Seconds Is a Practical Surrogate of FEV₁/FVC for the Diagnosis of Airway Limitation in Inadequate Spirometry
Hao Li, Chunhong Liu, Yi Zhang and Wei Xiao

Respiratory Care March 2017, 62 (3) 363-369; DOI: https://doi.org/10.4187/respcare.05016
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Late Presentation of Double Aortic Arch in School-Age Children Presumed to Have Asthma: The Benefits of Spirometry and Examination of the Flow-Volume Curve
Derek A Uchida

Respiratory Care October 2009, 54 (10) 1402-1404;