M. Lungarella, F. Iida, J. Bongard, and R. Pfeifer. 50 Years of Artificial Intelligence, volume 4850 of Lecture Notes in Computer Science, page 1-8. Springer, (2006)
D. Polani, O. Sporns, and M. Lungarella. 50 Years of Artificial Intelligence, volume 4850 of Lecture Notes in Computer Science, page 99-111. Springer, (2006)