@article{ref1,
title="Methodological problems of life event research",
journal="Nervenarzt",
year="1980",
author="Katschnig, H.",
volume="51",
number="6",
pages="332-343",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0028-2804",
doi="",
url="http://dx.doi.org/"
}