1. Ashton, N.M., McNabb, J., 1994. Bifaces in perspective. Stories in stone. Lithics Studies Society Occasional Papers 4.
2. Bifaces and raw-materials: flexible flaking in the British Early Paleolithic;Ashton,2003
3. Typologie du Paléolithique ancien et moyen;Bordes,1961
4. Analysis by replication of two Acheulean artifact assemblages;Bradley,1986
5. Variability in Acheulean technology at Elandsfontein. Poster Presented at the Paleoanthropology Society Meetings;Braun,2008