1. J.L. Bradshaw, Human Evolution, Psychology Press, Hove, 1997.
2. N. Chomsky, Reflections on Language, Pantheon, NY, 1975.
3. M.C. Corballis, From mouth to hand, Behav. Brain Sci., in press.
4. Perception of the speech code;Liberman;Psych. Rev.,1967
5. Premotor cortex and the recognition of motor actions;Rizzolatti;Cogn. Brain Res.,1996