Herrera Fernández, Eduardo, et al. “The Graphic Language of Eduardo Chillida As a Conceptual Contribution to the Typographic Identity of the University of the Basque Country, UPV EHU”. Revista de Bellas Artes. Artes Plásticas, Estética, Diseño E Imagen, no. 11, Apr. 2011, pp. 181-96, https://www.ull.es/revistas/index.php/artes/article/view/5295.