@article{ref1,
title="Sleep and head injury",
journal="Psychiatric medicine",
year="1989",
author="Kowatch, R. A.",
volume="7",
number="1",
pages="37-41",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0732-0868",
doi="",
url="http://dx.doi.org/"
}