@article{ref1,
title="Age- and sex-related differences in threat perception in a modern urban society",
journal="Aggressive behavior",
year="1989",
author="Rasa, O. Anne E. and Hopp, M",
volume="15",
number="5",
pages="389-398",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0096-140X",
doi="",
url="http://dx.doi.org/"
}