Rivero, José Antonio (1 September 2023). "Sergio León está de vuelta" [Sergio León is back]. Estadio Deportivo (in Spanish). Retrieved 12 September 2023.
Sierra, David (27 August 2016). "La Real bate al coraje de Osasuna" [Real defeat Osasuna's courage]. Marca (in Spanish). Retrieved 27 August 2016.
Campos, Tomás (22 September 2016). "El Espanyol respira a costa de Osasuna" [Espanyol take a breather at the expense of Osasuna]. Marca (in Spanish). Retrieved 25 December 2016.
"Sergio León, experiencia para la punta" [Sergio León, experience for the forward lines] (in Spanish). Real Valladolid. 31 August 2021. Retrieved 31 August 2021.