@article{ref1,
title="Pneumocephalus: a hazard of pipe smoking",
journal="Injury",
year="1994",
author="Whitfield, P. C. and Coombes, A. G.",
volume="25",
number="2",
pages="120-121",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-1383",
doi="",
url="http://dx.doi.org/"
}