@article{ref1,
title="Epidemiology and economics of motorcycle accidents",
journal="Lakartidningen",
year="1984",
author="Andren-Sandberg, A. and Norlund, A. and Ryd, L.",
volume="81",
number="21",
pages="2169-2171",
abstract="Abstract unavailable.",
language="",
issn="0023-7205",
doi="",
url="http://dx.doi.org/"
}