@article{ref1,
title="Cerebral concussion, a problem in pathogenesis in evaluation of disability",
journal="Acta neurovegetativa (Wien)",
year="1952",
author="Birkmayer, W.",
volume="4",
number="4-5",
pages="453-469",
abstract="<p>[Abstract unavailable]</p><p>Language: un</p>",
language="un",
issn="0375-9245",
doi="",
url="http://dx.doi.org/"
}