@article{ref1,
title="Utility theory and additivity analysis of risky choices",
journal="Journal of experimental psychology",
year="1967",
author="Tversky, A.",
volume="75",
number="1",
pages="27-36",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-1015",
doi="",
url="http://dx.doi.org/"
}