@article{ref1,
title="Head injuries. II. Causes and competing injuries in 596 patients during over a 4-year period",
journal="Ugeskrift for Laeger",
year="1987",
author="Nielsen, J. O. and Sørensen, H. T. and Nissen, I. and Nielsen, Jimmi",
volume="149",
number="10",
pages="683-685",
abstract="<p>[Abstract unavailable]</p><p>Language: da</p>",
language="da",
issn="0041-5782",
doi="",
url="http://dx.doi.org/"
}