@article{ref1,
title="Head injuries",
journal="South African medical journal SAMJ",
year="1988",
author="De Villiers, J. C.",
volume="73",
number="11",
pages="630-631",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}