@article{ref1,
title="Felonious murder of police officers by ambush",
journal="Psychological reports",
year="1990",
author="Young, T. J.",
volume="67",
number="1",
pages="206-206",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-2941",
doi="",
url="http://dx.doi.org/"
}