@article{ref1,
title="The danger of air pollution in railroad tunnels",
journal="Archiv für Gewerbepathologie und Gewerbehygiene",
year="1955",
author="Massmann, W.",
volume="14",
number="2",
pages="129-189",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0365-2564",
doi="",
url="http://dx.doi.org/"
}