@article{ref1,
title="Cognitive effects of sleep and sleep fragmentation",
journal="Sleep",
year="1993",
author="Bonnet, M. H.",
volume="16",
number="8 Suppl",
pages="S65-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0161-8105",
doi="",
url="http://dx.doi.org/"
}