@article{ref1,
title="Means of decrease of injuries in coal mines",
journal="Ortopediia travmatologiia i protezirovanie",
year="1969",
author="Ostapenko, A. A.",
volume="30",
number="9",
pages="62-66",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0030-5987",
doi="",
url="http://dx.doi.org/"
}