@article{ref1,
title="Autonomic arousal and performance during sixty hours of sleep deprivation",
journal="Perceptual and motor skills",
year="1972",
author="Fenz, W. D. and Graig, J. G.",
volume="34",
number="2",
pages="543-553",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}