言語学上の未解決問題
↑ Givon, Talmy; Bertram F. Malle (2002). The Evolution of Language Out of Pre-language. John Benjamins. ISBN 1-58811-237-3
↑ Deacon, Terrence (1997). The Symbolic Species: The Co-evolution of Language and the Brain. W.W. Norton. ISBN 0-571-17396-9
↑ MacNeilage, Peter, 2008. The Origin of Speech. Oxford: Oxford University Press.
↑ Botha, R. and C. Knight (eds) 2009. The Cradle of Language. Oxford: Oxford University Press.
↑ "Simulated Evolution of Language: a Review of the Field", Journal of Artificial Societies and Social Simulation vol. 5, no. 2
↑ Robert Spence, "A Functional Approach to Translation Studies. New systemic linguistic challenges in empirically informed didactics", 2004, ISBN 3-89825-777-0, thesis. A pdf file