Arrizabalaga, A., J. Rios-Garaizar, J.-M. Maíllo-Fernández, and M.-J. Iriarte-Chiapusso. “Identifying the Signs: The Middle to Upper Palaeolithic Transition in Northern Iberia from the Perspective of the Lithic Record”. Journal of Lithic Studies, Vol. 1, no. 2, Sept. 2014, pp. 151-66, doi:10.2218/jls.v1i2.1064.