@article{ref1,
title="Problems of Classification",
journal="Crime and delinquency",
year="1955",
author="Brancale, R.",
volume="1",
number="2",
pages="118-125",
abstract="[Abstract unavailable]  Language: en",
language="",
issn="0011-1287",
doi="10.1177/001112875500100204",
url="http://dx.doi.org/10.1177/001112875500100204"
}