Introduction

References

1. Christiansen, M. H. , & Kirby, S.
   (2003) Language Evolution: The Hardest Problem in Science?In M. H. Christiansen & S. Kirby (Eds.), Language Evolution (pp.1–15). Oxford: Oxford University Press. 10.1093/acprof:oso/9780199244843.003.0001
   https://doi.org/10.1093/acprof:oso/9780199244843.003.0001 [Google Scholar]
2. Graffi, G.
   (2005) The Problem of the Origin of Language in Western Philosophy and Linguistics. Lingue e linguaggio, 4(1), 5–26.
   [Google Scholar]
3. Heine, B. & Kuteva, T.
   (2007) The Genesis of Grammar. A Reconstruction. Oxford: Oxford University Press.
   [Google Scholar]
4. McMahon, A. & McMahon, R.
   (2013) Evolutionary Linguistics. Cambridge: Cambridge University Press.
   [Google Scholar]
5. Morpurgo Davies, A.
   (1998) Nineteenth-Century Linguistics. London & New York: Longman.
   [Google Scholar]