@article{ref1,
title="Closed brain injuries: an engineering analysis",
journal="Journal of biomechanics",
year="1969",
author="Kopecky, J. A. and Ripperger, E. A.",
volume="2",
number="1",
pages="29-34",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9290",
doi="",
url="http://dx.doi.org/"
}