J. A.  Pyles, Garcia, J. O., Hoffman, D. D., and Grossman, E. D., ?Visual perception and neural correlates of novel 'biological motion'?, Vision Research, vol. 47, pp. 2786?2797, 2007.

P.  Mandik, ?Varieties of Representation in Evolved and Embodied Neural Networks?, Biology and Philosophy, vol. 18, pp. 95?130, 2003.