@article{ref1,
title="Penry revisited: is execution of a person who has mental retardation cruel and unusual?",
journal="The journal of the American Academy of Psychiatry and the Law",
year="2002",
author="Herbert, Paul B. and Young, Kathryn A.",
volume="30",
number="2",
pages="282-286",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1093-6793",
doi="",
url="http://dx.doi.org/"
}