@article{ref1,
title="CRASH helmets on trial",
journal="British medical journal: BMJ",
year="1957",
author="",
volume="",
number="5045",
pages="636-636",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}