@article{ref1,
title="Social Norms and Social Roles",
journal="Columbia law review",
year="1996",
author="Sunstein, Cass R.",
volume="96",
number="4",
pages="903-968",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0010-1958",
doi="10.2307/1123430",
url="http://dx.doi.org/10.2307/1123430"
}