Alissandrakis, A., Nehaniv, C. L., and Dautenhahn, K. (2002). Do as I do: Correspondences across different robotic embodiments. In Polani, D., Kim, J., and Martinetz, T., editors, Proceedings of the Fifth German Workshop on Artificial Life (GWAL5), pages 143--152. 18-20 March 2002, Lbeck, Germany.

Belpaeme, T., de Boer, B., de Vylder, B., and Jansen, B. (2003). The role of population dynamics in imitation. submitted to Second International Symposium on Imitation in Animals and Artifacts.

Billard, A. and Hayes, G. (1997). Transmitting communication skills through imitation in autonomous robots. In Birk, A. and Demiris, Y., editors, Proceedings of EWLR97, Sixth European Workshop on Learning Robots. Springer. Brighton, UK, July 1997.

de Boer, B. (2000). Self organization in vowel systems. Journal of Phonetics, 28:441--465.

De Vylder, B. (2002). Forward and inverse kinematics of the teach-robot. Technical Report AI MEMO 02-02, Artificial Intelligence Lab, Vrije Universiteit Brussel, Brussels.

Everitt, B. (1993). Cluster Analysis. Edward Arnold, London.

Konolige, K. (1997). Small Vision System: Hardware and Implementation. http://www.ai.sri. com/konolige/svs/Papers.

Myers, C. S. and Rabiner, L. R. (1981). A comparative study of several dynamic time-warping algorithms for connected word recognition. The Bell System Technical Journal, 60:1389--1409.

Oates, T., Firoiu, L., and Cohen, P. (1999). Clustering time series with hidden markov models and dynamic time warping. In Proceedings of the IJCAI-99 Workshop on Neural, Symbolic and Reinforcement Learning Methods for Sequence Learning, pages 17--21.

Steels, L. and Kaplan, F. (1999). Bootstrapping grounded word semantics. In Briscoe, T., editor, Linguistic evolution through language acquisition: formal and computational models. Cambridge University Press, Cambridge, UK.

Tibshirani, R., Walther, G., and Hastie, T. (2000). Estimating the number of clusters in a dataset via the gap statistic. Technical Report 208, Dept. of Statistics, Stanford University.

Vogt, P. (2000). Grounding language about actions: Mobile robots playing follow me games. In Meyer, Bertholz, Floreano, Roitblat, and Wilson, editors, SAB2000 Proceedings Supplement Book. International Society for Adaptive Behavior.