@article{ref1,
title="Traffic Problems of the City Expansion",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1920",
author="Eiselen, F",
volume="64",
number="",
pages="868-868",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}