@article{ref1,
title="A critique of "levels of selection: An alternative to individualism in biology and the human sciences", David Sloan Wilson 1989 social networks 11: 257-272",
journal="Social networks",
year="1991",
author="Kopp, Johannes",
volume="13",
number="4",
pages="387-392",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0378-8733",
doi="10.1016/0378-8733(91)90003-C",
url="http://dx.doi.org/10.1016/0378-8733(91)90003-C"
}