@article{ref1,
title="The nature of juvenile delinquency",
journal="Pediatrics",
year="1956",
author="Beck, B. M.",
volume="17",
number="6",
pages="930-933",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}