@article{ref1,
title="Modern ventilation methods in tunnels for motor vehicles",
journal="Gesundheits-Ingenieur",
year="1978",
author="Baum, Fran",
volume="99",
number="12",
pages="353-360",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0016-9277",
doi="",
url="http://dx.doi.org/"
}