@article{ref1,
title="Self-paced ergometer performance: effects of pedal resistance, motivational contingency and inspired oxygen concentration",
journal="Perceptual and motor skills",
year="1972",
author="Gerben, M. J. and House, J. L. and Winsmann, F. R.",
volume="34",
number="3",
pages="875-881",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}