@article{ref1,
title="Pre-adolescent gangs:  a topological interpretation",
journal="Journal of genetic psychology",
year="1952",
author="Crane, A. R.",
volume="81",
number="1",
pages="113-123",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-1325",
doi="",
url="http://dx.doi.org/"
}