Arnaiz-Villena, A., Ruiz-del-Valle, V., Juarez, I., Vaquero-Yuste, C., Martín-Villa, J. M., & Lledó, T. (2026). Lineal Upper Paleolithic scripts more ancient than some figures in Altamira Cave (Santander, Spain) are similar to those found in Sahara and Canary Islands . International Journal of Modern Anthropology, 3(25), 412–438. https://doi.org/10.4314/ijma.v3i25.5