@article{ref1,
title="Prevalence of the XYY syndrome in an institution for psychologically abnormal criminals",
journal="Acta psychiatrica Scandinavica",
year="1969",
author="Nielsen, Jimmi and Stürup, G. and Tsuboi, T. and Romano, D.",
volume="45",
number="4",
pages="383-401",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-690X",
doi="",
url="http://dx.doi.org/"
}