| 2006 | - | Differences and similarities between the natural gestural communication of the great apes and human children - Pika,Liebal | :: | |
| Liebermann, P. (1998). Eve spoke: Human language and human evolution (Vol. 11). New York: Norton, W. W. & Co.
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| 2003 | - | Linguistic differences and language design - Baker | :: | 3 |
| 18 Lieberman, P. (1999) Eve Spoke: Human Language and Human Evolution, W.W. Norton
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| 2002 | - | On the nature and evolution of the neural bases of human language - Lieberman | :: | 4 |
| Lieberman P. 1998. Eve spoke: human language and human evolution. New York: W.W. Norton; London: Picador, Macmillan.
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