@article{ref1,
title="Aggressive men with 2 chromosomes Y",
journal="Polski Tygodnik Lekarski",
year="1970",
author="Boczkowski, K.",
volume="25",
number="8",
pages="306-308",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0032-3756",
doi="",
url="http://dx.doi.org/"
}