| 2008 | - | Embodiment versus memetics - Bryson | :: | |
| Zuidema WH (2005) The major transitions in the evolution of language. Ph.D. thesis, Theoretical and Applied Linguistics, University of Edinburgh, United Kingdom 94 J. J. Bryson
| ||||
| 2005 | - | The Evolution of Language: A Comparative Review - Fitch | :: | 2 |
| Zuidema, W.H. (2005) The major transitions in the evolution of language. Unpublished PhD Thesis, University of Edinburgh, Edinburgh, pp 225
| ||||