@book{36408,
	author = {Krebs, Dennis.},
	title = {The origins of morality : an evolutionary account /},
	publisher = {Oxford University Press,},
	year = {2011.},
	address = {New York ;},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780199778232.001.0001}
}