@book{31809,
	author = {Carballo, David M. and ebrary, Inc.},
	title = {Cooperation & collective action},
	publisher = {University Press of Colorado,},
	year = {2013.},
	address = {Boulder, Colo. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10642010}
}