@article{ref1,
title="Considerations on mining accidents in Burgas region",
journal="Khirurgiia",
year="1958",
author="Danov, L. and Iordanov, E.",
volume="11",
number="9",
pages="862-866",
abstract="<p>[Abstract unavailable]</p><p>Language: bg</p>",
language="bg",
issn="0450-2167",
doi="",
url="http://dx.doi.org/"
}