Stone axes as cultural markers: technological, functional and symbolic changes in bifacial tools during the transition from hunter-gatherers to sedentary agriculturalists in the southern Levant - Barkai, Ran ('Prehistoric technology'. 40 years later: functional studies and the Russian legacy. Wear-traces, ethnoarchaeology, experimental archaeology. Proceedings of the international congress, Verona (Italy), 20-23 april 2005., 2008)