@article{ref1,
title="Longitudinal and Criminal Career Research: Further Clarifications",
journal="Criminology",
year="1988",
author="Blumstein, Alfred and Cohen, John and Farrington, David P.",
volume="26",
number="1",
pages="57-74",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0011-1384",
doi="",
url="http://dx.doi.org/"
}