References
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Ohkubo, E., Negishi, T., Oyamada, Y., Kimura, R. & Naganuma, M. (2003). Studies on necessary condition of companion robot in the RAA application. IEEE International Symposium on Computational Intelligence in Robotics and Automation 1: 102-6.
Tani, J., Ito, M. & Sugita, Y. (2005). Self-organization of distributedly represented multiple behavior schemata in a mirror system: reviews of robot experiments using RNNPB. Neural Networks 17(8-9): 1273-89.