@article{ref1,
title="Coping with crowding",
journal="Scientific American",
year="2000",
author="de Waal, F. B. and Aureli, F. and Judge, P. G.",
volume="282",
number="5",
pages="76-81",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8733",
doi="",
url="http://dx.doi.org/"
}