@article{ref1,
title="Threats to health or safety: perceived risk and willingness-to-pay",
journal="Social science and medicine, medical economics",
year="1981",
author="Brown, Richard A. and Green, C. H.",
volume="15",
number="2",
pages="67-75",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0160-7995",
doi="",
url="http://dx.doi.org/"
}