@article{ref1,
title="Motor Traffic and Urban Development",
journal="Deutsche Medizinische Wochenschrift",
year="1934",
author="Muller, G.",
volume="78",
number="",
pages="33-37",
abstract="[Abstract unavailable]  <p> </p>",
language="",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}