@article{ref1,
title="Bicycle helmets: it's time to use them",
journal="British medical journal: BMJ",
year="2000",
author="Rivara, Frederick P. and Thompson, D. C. and Thompson, R. S.",
volume="321",
number="7268",
pages="1035-1036",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}