@article{ref1,
title="On the nosology of endogenous depression. Comparison of the results of two studies",
journal="Archiv fur Psychiatrie und Nervenkrankheiten",
year="1968",
author="Angst, J. and Perris, C.",
volume="210",
number="4",
pages="373-386",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0003-9373",
doi="",
url="http://dx.doi.org/"
}