Ammerman, A.J. and Cavalli-Sforza, L.L.1973: A population model for the diffusion of early farming in Europe. In Renfrew, C. , editor, The explanation of culture change. Duckworth , 343-357.
2.
Ammerman, A.J. and Cavalli-Sforza, L.L.1984: The Neolithic transition and the genetics of populations in Europe. Princeton University Press .