@article{ref1,
title="Acute head injuries",
journal="AMA archives of surgery",
year="1957",
author="Wannamaker, G. T.",
volume="75",
number="5",
pages="738-739",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0096-6908",
doi="",
url="http://dx.doi.org/"
}