| 2007 | - | The Evolution of Human Speech: Its Anatomical and Neural Bases - Lieberman | :: | 1 |
| LIEBERMAN P, B. G. KANKI, A. PROTOPAPAS, E. REED AND J. W. YOUNGS. 1994. Cognitive defects at altitude. Nature 372:325.
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| 2002 | - | On the nature and evolution of the neural bases of human language - Lieberman | :: | 6 |
| Lieberman P, Kanki BG, Protopapas A, Reed E, Youngs JW. 1994. Cognitive defects at altitude. Nature 372:325.
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