@article{ref1,
title="A 7-year review of maxillofacial trauma in a central London hospital",
journal="British dental journal",
year="1991",
author="Cheng, L. H. and Smith, M. T.",
volume="171",
number="2",
pages="45-45",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0007-0610",
doi="",
url="http://dx.doi.org/"
}