| 2000 | - | The evolution of speech: a comparative review - Fitch | :: | 24 |
| 2002 | - | On the nature and evolution of the neural bases of human language - Lieberman | :: | 6 |
| 2002 | - | Comparative Vocal Production and the Evolution of Speech: Reinterpreting the Descent of the Larynx - Fitch | :: | 3 |
| 2007 | - | The Evolution of Human Speech: Its Anatomical and Neural Bases - Lieberman | :: | 1 |
| 2007 | - | Symbols are not uniquely human - Ribeiro,Loula,Araujo,Gudwin,Queiroz | :: | 1 |