@article{ref1,
title="Far too few schoolchildren use protective helmets when bicycling. review of the literature and questionnaires as basis for promotion of increased use of the helmets",
journal="Lakartidningen",
year="1999",
author="Westerling, Ragnar and Berg, Peter",
volume="96",
number="19",
pages="2383-2386",
abstract="Abstract unavailable.",
language="",
issn="0023-7205",
doi="",
url="http://dx.doi.org/"
}