@article{ref1,
title="The relationship between cannabis and violence: a review",
journal="Psychological bulletin",
year="1977",
author="Abel, Ernest L.",
volume="84",
number="2",
pages="193-211",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-2909",
doi="",
url="http://dx.doi.org/"
}