P. Pietsch

Respiratory phase detection and delay determination for breath-by-breath analysis.

U. Boutellier, E. Koller, T. Kündig, 1987, Journal of applied physiology.

Oxygen deficit and stores at onset of muscular exercise in humans.

P. D. di Prampero, U. Boutellier, P. Pietsch, 1983, Journal of applied physiology: respiratory, environmental and exercise physiology.

Design and Construction of a Pulsed Ultrasonic Air Flowmeter

W. Guggenbuhl, E. Koller, C. Buess, 1986, IEEE Transactions on Biomedical Engineering.

A pulsed diagonal-beam ultrasonic airflow meter.

W. Guggenbühl, W. Guggenbuhl, E A Koller, 1986, Journal of applied physiology.

Effect of coupling the breathing- and cycling rhythms on oxygen uptake during bicycle ergometry

J. Kohl, F. Garlando, J. Kohl, 2004, European Journal of Applied Physiology and Occupational Physiology.