@article{ref1,
title="The Pay Systems on Dangerous Work Machines and Its Influence on the Prevention of Accidents",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1923",
author="Kleditz, D",
volume="67",
number="",
pages="1024-1027",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}