Laffey, J. G., & Kavanagh, B. P. Hypocapnia. New England Journal of Medicine (2002);
347(1): 43-53.

Litchfield, Peter M. CapnoLearning: respiratory fitness and acid-base regulation.
Psychophysiology Today (2010).

Litchfield, Peter M. Breathing: aligning mechanics with chemistry. IBF Newsletter – June, 2017.

A slide presentation: Learn to Screen Clients for Dysfunctional Breathing Habits