@article{ref1,
title="Head injuries today",
journal="Postgraduate medical journal",
year="1967",
author="Potter, J. M.",
volume="43",
number="503",
pages="574-581",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0032-5473",
doi="",
url="http://dx.doi.org/"
}