@article{ref1,
title="Juvenile homicides and sex offenses",
journal="Psychiatria Polska",
year="1972",
author="Szymusik, A. and Leśniak, R. and Uniwersal, E.",
volume="6",
number="2",
pages="143-149",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0033-2674",
doi="",
url="http://dx.doi.org/"
}