| 2006 | - | Scaling laws in language evolution - Sole | :: | |
| 9. Ferrer Cancho, Ramon, 2004. Language: Universals, Principles and Origins. Ph D Dissertation. Universitat Politecnica de Catalunya.
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| 2005 | - | Language Networks: their structure, function and evolution - Sole,Corominas,Valverde,Steels | :: | |
| [34] Ferrer i Cancho, R. (2004) Language: universals, principles and origins. PhD Thesis. Universitat Politecnica de Catalunya. Barcelona, Spain.
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