@article{ref1,
title="Bicycle helmet use",
journal="Injury prevention",
year="1996",
author="Thompson, D. and Rivara, Frederick P. and Thompson, Ricardo",
volume="2",
number="4",
pages="304-304",
abstract="Abstract unavailable.",
language="en",
issn="1353-8047",
doi="",
url="http://dx.doi.org/"
}