Flintknapping and measuring: A protocol for evaluating quality in knappable raw materials through quantitative values of fragility and homogeneity - Cuartero, Felipe; Llamazares González, Javier; Rodríguez, Jesús; Sarró Moreno, María Isabel; Martínez de Pinillos, Marina; Sáiz Dominguez, Carlos; Sahnouni, Mohamed (2022)