@article{ref1,
title="Population preventable fraction of bicycle related head injuries",
journal="Injury prevention",
year="2001",
author="Hagel, Brent Edward and Boivin, Jean-Francois",
volume="7",
number="1",
pages="78-78",
abstract="Abstract unavailable.",
language="en",
issn="1353-8047",
doi="",
url="http://dx.doi.org/"
}