@article{ref1,
title="Work protection in Bulgaria",
journal="Pielȩgniarka i Połozna",
year="1970",
author="",
volume="11",
number="",
pages="26-27",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0048-4148",
doi="",
url="http://dx.doi.org/"
}