% pubman genre = article @article{item_1552946, title = {{Calculated reciprocity after all: computation behind token transfers in orang-utans}}, author = {Dufour, Val{\'e}rie and P{\'e}le, Marie and Neumann, Martina and Thierry, Bernard and Call, Josep}, language = {eng}, doi = {10.1098/rsbl.2008.0644}, year = {2009}, date = {2009}, journal = {{Biology Letters}}, volume = {5}, number = {2}, pages = {172--175}, }