@article{ref1,
title="Essential Differences between Sex Offenders",
journal="Journal of criminal law and criminology (1931-1951)",
year="1941",
author="Leppmann, F",
volume="32",
number="3",
pages="366-380",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-2731",
doi="",
url="http://dx.doi.org/"
}