@article{ref1,
title="Urban planning for the prevention of accidents",
journal="Medizinische Klinik [Urban und Schwarzenberg]",
year="1970",
author="Ludmann, H.",
volume="65",
number="2",
pages="49-52",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0025-8458",
doi="",
url="http://dx.doi.org/"
}