@article{ref1,
title="Where angels fear to tread: a contribution from general sociology to human ethics",
journal="Science",
year="1943",
author="Allee, W. C.",
volume="97",
number="2528",
pages="517-525",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8075",
doi="10.1126/science.97.2528.517",
url="http://dx.doi.org/10.1126/science.97.2528.517"
}