@article{ref1,
title="Criteria in criminal definitions. a study in the foundations of law enforcement",
journal="Journal of criminal law and criminology (1931-1951)",
year="1939",
author="Parratt, Spencer D.",
volume="30",
number="3",
pages="332-352",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-2731",
doi="10.2307/1137597",
url="http://dx.doi.org/10.2307/1137597"
}