Ujhelyi, M. (1998) Long call structure in apes as a possible precursor for language. In Hurford, J. R. and Studdert-Kennedy, M. and Knight C., editors, Approaches to the Evolution of Language: Social and Cognitive Bases . Cambridge: Cambridge University Press.

Ujhelyi, M. (1998) Long call structure in apes as a possible precursor for language. In Hurford, J. R. and Studdert-Kennedy, M. and Knight C., editors, Approaches to the Evolution of Language: Social and Cognitive Bases. Cambridge: Cambridge University Press.

1999	-	Possible stages in the evolution of the language capacity - Jackendoff	::	21
		31 Ujhelyi, M. (1998) Long-call structure in apes as a possible precursor for language, in Approaches to the Evolution of Language (Hurford, J., Studdert-Kennedy, M. and Knight, C., eds), pp. 177--189, Cambridge University Press