@article{ref1,
title="On the frequency and psychopathological motivation of suicide in twins and single children",
journal="Monatsschrift fur Psychiatrie und Neurologie",
year="1949",
author="Kallmann, F. J.",
volume="117",
number="4-6",
pages="280-288",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0369-1519",
doi="",
url="http://dx.doi.org/"
}