1. Ball W, Vurpillot E (1981) Action and perception of displacements in infancy. In: Butterworth GE (ed) Infancy and epistemology: an evaluation of Piaget’s theory. Harvester, Brighton
2. Ballard DH, Hinton GE, Sejnowski TJ (1983) Parallel visual computation. Science 306: 21–26
3. Bower TGR (1979) Human development. Freeman, San Francisco
4. Bower TGR, Broughton JM, Moore MK (1970) The coordination of visual and tactual input in infants. Perception Psychophysics 8: 51–53
5. Bruner JS (1973) Organization of early skilled action. Child Dev 44: 1–11