Mallory, J.P.1989: In search of the Indo-Europeans. London: Thames and Hudson .
2.
Renfrew, C.2000: At the edge of knowability: towards a prehistory of languages.
3.
Zvelebil, M.1995: At the interface of archaeology, linguistics and genetics: Indo-European origins and the agricultural transition in Europe . Journal of European Archaeology3, 33–70 .