@article{ref1,
title="Prevention of trauma in coal mining industry",
journal="Ortopediia travmatologiia i protezirovanie",
year="1957",
author="Dvorkin, A. M.",
volume="18",
number="1",
pages="47-50",
abstract="<p>[Abstract unavailable]</p> <p>Language: ru</p>",
language="ru",
issn="0030-5987",
doi="",
url="http://dx.doi.org/"
}