@article{ref1,
title="The role of helmets in skiing and snowboarding",
journal="British journal of sports medicine",
year="2002",
author="McCrory, Paul",
volume="36",
number="5",
pages="314-314",
abstract="Abstract unavailable.",
language="",
issn="0306-3674",
doi="",
url="http://dx.doi.org/"
}