@article{ref1,
title="Causes of the post-concussional syndrome",
journal="Acta neurologica Scandinavica, Supplementum",
year="1974",
author="Lidvall, H. F. and Linderoth, B. and Norlin, B.",
volume="56",
number="",
pages="3-144",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0065-1427",
doi="",
url="http://dx.doi.org/"
}