Recio García 2018, p. 66,...."Hence, on the morning of July 22, 1921, the retreat began, but without General Fernandez Silvestre, who would die in Annual. That retreat of the column without its main commander, became a disorderly flight that was provoking at the same time, the progressive fall in the following days, of all the Spanish garrisons up to Melilla". Recio García, María Ángeles (2018). "El desastre de Annual en el Parlamento español: las Comisiones de Responsabilidades"(PDF). Guerra Colonial. Revista Digital (in Spanish) (2): 61–78. Archived from the original(PDF) on December 31, 2021. Retrieved January 7, 2022.
Recio García 2018, p. 68-69,...."The latter [General Picasso] went to Melilla with a team of assistants in order to consult the archives of that Command and also to interview the survivors of the disaster". Recio García, María Ángeles (2018). "El desastre de Annual en el Parlamento español: las Comisiones de Responsabilidades"(PDF). Guerra Colonial. Revista Digital (in Spanish) (2): 61–78. Archived from the original(PDF) on December 31, 2021. Retrieved January 7, 2022.
"Picasso File card in the National Historical Archive". PARES. FC-TRIBUNAL_SUPREMO_RESERVADO,Exp.50 - 1. Información gubernativa instruida para esclarecer los antecedentes y circunstancias que concurrieron en el abandono de posiciones del territorio de la Comandancia General de Melilla en el mes de julio de 1921 (Expediente Picasso).{{cite web}}: CS1 maint: others (link)
Recio García 2018, p. 66,...."Hence, on the morning of July 22, 1921, the retreat began, but without General Fernandez Silvestre, who would die in Annual. That retreat of the column without its main commander, became a disorderly flight that was provoking at the same time, the progressive fall in the following days, of all the Spanish garrisons up to Melilla". Recio García, María Ángeles (2018). "El desastre de Annual en el Parlamento español: las Comisiones de Responsabilidades"(PDF). Guerra Colonial. Revista Digital (in Spanish) (2): 61–78. Archived from the original(PDF) on December 31, 2021. Retrieved January 7, 2022.
Recio García 2018, p. 68-69,...."The latter [General Picasso] went to Melilla with a team of assistants in order to consult the archives of that Command and also to interview the survivors of the disaster". Recio García, María Ángeles (2018). "El desastre de Annual en el Parlamento español: las Comisiones de Responsabilidades"(PDF). Guerra Colonial. Revista Digital (in Spanish) (2): 61–78. Archived from the original(PDF) on December 31, 2021. Retrieved January 7, 2022.