@article{ref1,
title="Punishment learning and self-mutilation in Lesch-Nyhan disease",
journal="Nature",
year="1977",
author="Anderson, Lynda and Dancis, J. and Alpert, M. and Herrmann, L.",
volume="265",
number="5593",
pages="461-463",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}