Ayala Sörense, Federico (September 25, 2014). Expósiot, Ángel (ed.). "El verdadero "Hombre del Saco"". ABC (in Spanish). Diario ABC, S.L. Archived from the original on April 4, 2019. Retrieved March 27, 2018.
Ayala Sörense, Federico (September 25, 2014). Expósiot, Ángel (ed.). "El verdadero "Hombre del Saco"". ABC (in Spanish). Diario ABC, S.L. Archived from the original on April 4, 2019. Retrieved March 27, 2018.