@article { almeida11,
	journal = {Folia Primatologica },
	keywords = {Multi-Agent Societies;Game Theory;},
	number = {6},
	pages = {372},
	title = {Individual Cognition and the Complexity of Cooperation },
	volume = {82},
	year = {2011},
	author = {André Almeida and João A. Moreira and Marta D. Santos and Francisco C. Santos and Jorge M. Pacheco}
}