@article{ref1,
title="The necessity for longitudinal studies in risk perception research",
journal="Risk analysis",
year="2013",
author="Siegrist, Michael",
volume="33",
number="1",
pages="50-51",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0272-4332",
doi="10.1111/j.1539-6924.2012.01941.x",
url="http://dx.doi.org/10.1111/j.1539-6924.2012.01941.x"
}