@article{ref1,
title="Violence in mental patients. An epidemiological study in the German Federal Republic",
journal="Recenti progressi in medicina",
year="1974",
author="Hafner, H. and Böker, W.",
volume="57",
number="2",
pages="116-128",
abstract="<p>[Abstract unavailable]</p> <p>Language: it</p>",
language="it",
issn="0034-1193",
doi="",
url="http://dx.doi.org/"
}