Garmendia, Xabier (8 February 2010). "El fértil vivero navarro del Athletic" [Athletic's fertile Navarrese nursery]. El Mundo (in Spanish). Retrieved 27 June 2017.
Segura, Alejandro (24 October 2017). "Crónica de una suplencia anunciada" [Chronicle of a reserve foretold]. Marca (in Spanish). Retrieved 14 December 2018.