@article{ref1,
title="People- and goods transportation with heavy vehicles",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1906",
author="Heller, A.",
volume="50",
number="",
pages="907-911",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}