@article{ref1,
title="Sleep, performance and mood after the energy-expenditure equivalent of 40 hours of sleep deprivation",
journal="Psychophysiology",
year="1980",
author="Bonnet, M. H.",
volume="17",
number="1",
pages="56-63",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0048-5772",
doi="",
url="http://dx.doi.org/"
}