@book{198369,
	author = {National Academy of Sciences (U.S.) and Strassman, Joan E. and ebrary, Inc.},
	title = {Cooperation and conflict},
	publisher = {National Academies Press,},
	year = {2012.},
	series = {In the light of evolution ;},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10554793}
}