@article{ref1,
title="Guide to a precise diagnosis of depression",
journal="Landarzt",
year="1965",
author="Schmitz, E.",
volume="41",
number="3",
pages="89-94",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0023-7728",
doi="",
url="http://dx.doi.org/"
}