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pages = {763--768},  publisher = {ASME Press},  }  @inproceedings{potter2001heterogeneity,  title = {{Heterogeneity in the coevolved behaviors of mobile robots: The emergence of specialists}},  author = {Potter, Mitchell A and Meeden, Lisa A and Schultz, Alan C},  booktitle = {International joint conference on artificial intelligence},  volume = {17},  number = {1},  pages = {1337--1343},  year = {2001},  organization = {Citeseer},  }