@article{ref1,
title="Dust detection apparatus in hard coal mines",
journal="Pracovni Lekarstvi",
year="1960",
author="Pachner, P.",
volume="12",
number="",
pages="305-307",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0032-6291",
doi="",
url="http://dx.doi.org/"
}