1. Obstructing lesions of the larynx and trachea: clinical and physiological characteristics;Miller;Mayo Clin Proc,1969
2. Diagnosis of obstruction of the upper and central airways;Kryger;Am J Med,1976
3. Assessment of upper airways obstruction;Empey;Br Med J,1972
4. Isoflow-volume curves in the diagnosis of upper airway obstruction;Lavelle;Am Rev Respir Dis,1978
5. Spirometric tests of upper airway obstruction (UAO). A re-evaluation [resumen];Vincken;Am Rev Respir Dis,1988