| 2001 | - | Evolution of communication and language using signals, symbols, and words - Cangelosi | :: | 22 |
| 2002 | - | Symbol Grounding and the Symbolic Theft Hypothesis - Cangelosi,Greco,Harnad | :: | 4 |
| 2000 | - | The Origin of Symbols in the Brain - Balkenius,Gardenfors,Hall | :: | 1 |
| 2006 | - | When language breaks into pieces: A conflict between communication through isolated signals and language - Ferrer-i-Cancho | :: | 1 |