Rincón, Jaime (17 May 2015). "Williams señala a Europa" [Williams points to Europe]. Marca (in Spanish). Retrieved 18 May 2015.
Velasco, Juanma (4 January 2016). "Aketxe se recalifica en el filial" [Aketxe undergoes makeover in reserves]. Marca (in Spanish). Retrieved 6 January 2016.