Johansson, S. (2006) Working backwards from modern language to proto-grammar. In Proceedings of the 6th International Conference on the Evolution of Language , pages 160--167.

2008	-	Language as shaped by the brain - Christiansen,Chater	::	5
		Johansson, S. (2006) Working backwards from modern language to proto-grammar. In: The evolution of language, ed. A. Cangelosi, A. D. M. Smith & K. Smith, pp. 160-67. World Scientific.