@article{ref1,
title="Study of Civilian-Caused Murders of Police Officers",
journal="International journal of criminology and penology",
year="1978",
author="Lester, David",
volume="6",
number="4",
pages="373-378",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0306-3208",
doi="",
url="http://dx.doi.org/"
}