@INCOLLECTION { beuls:12b, address = {Amsterdam},author = {Beuls, Katrien and Steels, Luc and Höfer, Sebastian},booktitle = {Experiments in Cultural Language Evolution},editor = {Steels, Luc},note = {Language},pages = {233--256},publisher = {John Benjamins},title = {The Emergence of Internal Agreement Systems},type = {INCOLLECTION},year = {2012},}