@article{ref1,
title="Sleep deprivation and some aspects of performance: iii. Motivation, comment and conclusions",
journal="Waking and sleeping",
year="1977",
author="Kjellberg, A.",
volume="1",
number="2",
pages="149-153",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0340-0905",
doi="",
url="http://dx.doi.org/"
}