@article{ref1,
title="The suicide problem in urban and rural areas",
journal="Medizinische Klinik [Urban und Schwarzenberg]",
year="1962",
author="Valentin, M.",
volume="57",
number="",
pages="1305-1308",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0025-8458",
doi="",
url="http://dx.doi.org/"
}