@article{ref1,
title="Obligatory protective helmet even for moped rides!",
journal="Lakartidningen",
year="1976",
author="Stromberg, L.",
volume="73",
number="5",
pages="312-312",
abstract="Abstract unavailable.",
language="",
issn="0023-7205",
doi="",
url="http://dx.doi.org/"
}