 | Up a level |
Barta, Zoltán; McNamara, John M.; Huszár, Dóra B.; Taborsky, Michael (2011). Cooperation among non-relatives evolves by state-dependent generalized reciprocity. Proceedings of the Royal Society. Series B - biological sciences, 278(1707), pp. 843-848. London: Royal Society of London 10.1098/rspb.2010.1634
