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2004	-	Self-organization and Language Evolution: System, Population and Individual - Ke	::
		Wang, W. S.-Y. (1976). Language change. Annals of the New York Academy of Sciences, 280:61.72.
1994	-	Infinite Languages, Finite Minds: Connectionism, Learning and Linguistic Structure - Christiansen	::	22
		Wang, W. S-Y. (1976) Language Change. Annals of the New York Academy of Sciences, 280, 61--72.