@article{ref1,
title="Extensional versus intuitive reasoning: the conjunction fallacy in probability judgment",
journal="Psychological review",
year="1983",
author="Tversky, A. and Kahneman, Daniel",
volume="90",
number="4",
pages="293-315",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-295X",
doi="10.1037/0033-295X.90.4.293",
url="http://dx.doi.org/10.1037/0033-295X.90.4.293"
}