@article{ref1,
title="Unusual foreign body in the cranial cavity",
journal="Polski Tygodnik Lekarski",
year="1975",
author="Holyst, J. and Majewski, A.",
volume="30",
number="48",
pages="2013-2014",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0032-3756",
doi="",
url="http://dx.doi.org/"
}