@article{ref1,
title="Busyness of Streets and Traffic Commotion Through Road Vehicles",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1928",
author="Langer, Peter and Thome, W",
volume="72",
number="",
pages="1561-1568",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}