Burkart, J.M., Fehr, E., Efferson, C. & van Schaik, C.P. 2007.
Other-regaring preferences in a non-human primate: Common marmosets
provision food altruistically. PNAS. 104:19762-19766.
December 2007
See also: Group-dynamicsDecision-making
Byrne, R.W. 2007. Ape
society: trading favours. Current
Biology 17:
R775-R776.
September 2007 See also:Group-dynamics Hughes, W.O.H., Oldroyd, B.P., Beekman, M. & Ratnieks, F.L.W. 2008. Ancestral monogamy shows kin selection is key to the evolution of eusociality. Science 230: 1213-1216. May 2008
Krams, I., Krama, T., Igaune,
K. & Mand, R. 2008. Experimental evidence of
reciprocal altruism in the pied flycatcher. Behavioral Ecology and
Sociobiology62: 599-605.February 2008
See also: RecognitionGroup-dynamics
Roberts, G. 2008. Evolution of direct and indirect reciprocity. Proc. R. Soc. B. 275: 173-179. January 2008
See also: Group-dynamics Rutte, C. & Taborsky, M. 2008. The influence of
social experience on cooperative behaviour of rats (Rattus norvegicus):
direct vs generalised reciprocity. Behavioral
Ecology and Sociobiology62:499-505.
February 2008
See also: Recognition
Rutte, C. & Taborsky,
M.2007. Generalized reciprocity
in rats. PLoS Biology 5: e196.
July 2007
See also: Communication
Schino, G. 2007. Grooming and agonistic support: a meta-analysis of primate reciprocal altruism. Behavioral Ecology 18: 115-120.January 2007 See also: Group-dynamics
Shutt, K., MacLarnon, A., Heistermann, M. & Semple, S. 2007.
Grooming in Barbary macaques: better to give than to receive? Biology Letters. 3:231-233.
June 2007 de Waal, F.M. 2007. With a little help from
a friend. PLoS Biology
5:e190 July 2007
Warneken, F. Hare, B., Melis, A.P., Hanus, D. & Tomasello, M.
2007. Spontaneous altruism by chimpanzees and young children. PLoS Biology 5: e184.June 2007 See also:Group-dynamics
Burkart, J.M., Fehr, E., Efferson, C. & van Schaik, C.P. 2007.
Other-regaring preferences in a non-human primate: Common marmosets
provision food altruistically. PNAS. 104:
19762-19766.
December 2007 
Hughes, W.O.H., Oldroyd, B.P., Beekman, M. & Ratnieks, F.L.W. 2008. Ancestral monogamy shows kin selection is key to the evolution of eusociality. Science 230: 1213-1216. May 2008
Krams, I., Krama, T., Igaune,
K. & Mand, R. 2008. Experimental evidence of
reciprocal altruism in the pied flycatcher. Behavioral Ecology and
Sociobiology
62: 599-605.
February 2008 
Roberts, G. 2008. Evolution of direct and indirect reciprocity. Proc. R. Soc. B. 275: 173-179. January 2008