@article{ref1,
title="On the influence of age on the frequency of lack of performance by engines-drivers of the Deutsche Bundesbahn (Federal German Railway)",
journal="Internationales Archiv für Arbeitsmedizin",
year="1974",
author="Hildebrandt, G. and Rohmert, W. and Rutenfranz, J.",
volume="32",
number="1",
pages="33-41",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0020-5923",
doi="",
url="http://dx.doi.org/"
}