@article{ref1,
title="The Incapacitative Effect of Imprisonment: Some Estimates",
journal="Law and society review",
year="1975",
author="Greenberg, David F.",
volume="9",
number="4",
pages="541-580",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0023-9216",
doi="",
url="http://dx.doi.org/"
}