% pubman genre = article @article{item_1552391, title = {{Reciprocity and trades in wild West African chimpanzees}}, author = {Gomes, Cristina M. and Boesch, Christophe}, language = {eng}, doi = {10.1007/s00265-011-1227-x}, year = {2011}, date = {2011}, journal = {{Behavioral Ecology and Sociobiology}}, volume = {65}, number = {11}, pages = {2183--2196}, }