@article{ref1,
title="Values and risk-taking behavior: the concept of calculated risk",
journal="Health education",
year="1975",
author="Clarke, Kenneth S. and Parcel, Guy S.",
volume="6",
number="6",
pages="26-28",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0097-0050",
doi="",
url="http://dx.doi.org/"
}