@article{ref1,
title="Penetrating head injury",
journal="Annals of emergency medicine",
year="1981",
author="Mittal, V. K. and Petinga, T. J. and Cortez, J. A.",
volume="10",
number="12",
pages="668-669",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}