@article{ref1,
title="Mandatory bicycle helmet use is a good thing",
journal="Duodecim: Laaketieteellinen Aikakauskirja",
year="2002",
author="Niskanen, R. and Nurmi, I. and Luthje, P.",
volume="118",
number="6",
pages="580-583",
abstract="Abstract unavailable.",
language="",
issn="0012-7183",
doi="",
url="http://dx.doi.org/"
}