@article{ref1,
title="Variants of uncertainty",
journal="Cognition",
year="1982",
author="Kahneman, Daniel and Tversky, A.",
volume="11",
number="2",
pages="143-157",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0010-0277",
doi="10.1016/0010-0277(82)90023-3",
url="http://dx.doi.org/10.1016/0010-0277(82)90023-3"
}