1. Measurement of the Ventilatory Response to Hypoxia
J. Severinghaus, M.D., Gerard Ozanne, M.D., Yacoub Massuda, M.D. 
CHEST 
Volume 70, Issue 1, Pages (July 1976)
DOI: /chest.70.1_Supplement.121
Copyright © 1976 The American College of Chest Physicians Terms and Conditions

2. Figure 1 Step hypoxia test with three-valve rebreathing system.
CHEST  , DOI: ( /chest.70.1_Supplement.121)
Copyright © 1976 The American College of Chest Physicians Terms and Conditions

3. Figure 2 Example of response to step hypoxia at constant PACO2.
CHEST  , DOI: ( /chest.70.1_Supplement.121)
Copyright © 1976 The American College of Chest Physicians Terms and Conditions