@article{ref1,
title="An evolutionary psychological perspective on gender similarities and differences",
journal="American psychologist, The",
year="2006",
author="Davies, Alastair P. C. and Shackelford, Todd K.",
volume="61",
number="6",
pages="640-1; discussion 641",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-066X",
doi="10.1037/0003-066X.61.6.640",
url="http://dx.doi.org/10.1037/0003-066X.61.6.640"
}