Fernández, Borja (21 May 2022). "Cuéllar busca completar la mejora" [Cuéllar seeks to complete upgrade] (in Spanish). Killer Asturias. Archived from the original on 30 April 2024. Retrieved 6 September 2022.
Zimmermann, Walter (8 January 2007). "Pichu, en tus manos" [Pichu, in your hands]. Mundo Deportivo (in Spanish). Archived from the original on 11 January 2019. Retrieved 11 January 2019.
"Iván Cuéllar regresa al Sporting" [Iván Cuéllar returns to Sporting] (in Spanish). Sporting Gijón. 29 August 2021. Archived from the original on 29 August 2021. Retrieved 30 August 2021.
"Pichu". Diario AS (in Spanish). Archived from the original on 7 September 2023. Retrieved 7 September 2023.
Zimmermann, Walter (8 January 2007). "Pichu, en tus manos" [Pichu, in your hands]. Mundo Deportivo (in Spanish). Archived from the original on 11 January 2019. Retrieved 11 January 2019.
"Iván Cuéllar regresa al Sporting" [Iván Cuéllar returns to Sporting] (in Spanish). Sporting Gijón. 29 August 2021. Archived from the original on 29 August 2021. Retrieved 30 August 2021.
Fernández, Borja (21 May 2022). "Cuéllar busca completar la mejora" [Cuéllar seeks to complete upgrade] (in Spanish). Killer Asturias. Archived from the original on 30 April 2024. Retrieved 6 September 2022.