@article{ref1,
title="Studies on the postmortem patterns of blood urea",
journal="Polski Tygodnik Lekarski",
year="1967",
author="Bryc, R. and Tomaszewska, Z.",
volume="22",
number="42",
pages="1607-1610",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0032-3756",
doi="",
url="http://dx.doi.org/"
}