@inbook{publication-1597,
	address={Oxford},
	author={Fehr, Ernst and Zehnder, Christian},
	booktitle={The Oxford companion to emotion and the affective sciences},
	editor={Sander, D and Scherer, K R},
	isbn={978-0-19-856963-3},
	pages={24-26},
	publisher={Oxford University Press},
	title={Altruism},
	year=2009,
}