@article{ref1,
title="US call for mandatory skiing helmets",
journal="British medical journal: BMJ",
year="1998",
author="Josefson, D.",
volume="316",
number="7126",
pages="172-172",
abstract="Abstract unavailable.",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}