From the flake to the blade. The technological evolution of the blade phenomenon in southern Europe. Co-existence, interaction and alternation of two concepts of tools - Leonardo Carmignani; Robert Sala Ramos (dir. tes.); Marie-Hélène Moncel (dir. tes.); Manuel Vaquero Rodríguez (pres.); José Manuel Maíllo Fernández (secr.); Marta Arzarello (voc.) (2017)