@article{ref1,
title="Causes of overloading symptoms and stress diseases",
journal="Medizinische Klinik [Urban und Schwarzenberg]",
year="1968",
author="Gerfeldt, E.",
volume="63",
number="2",
pages="47-51",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0025-8458",
doi="",
url="http://dx.doi.org/"
}