A. Arrizabalaga, 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”, JLS, vol. 1, no. 2, pp. 151–166, Sep. 2014.