@article{ref1,
title="Severe head injury: improvement of outcome",
journal="Intensive care medicine",
year="1999",
author="Unterberg, A.",
volume="25",
number="4",
pages="348-349",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0342-4642",
doi="",
url="http://dx.doi.org/"
}