22 November 1980 - Institutional correspondence Rafael Fernández Quintanilla's letter to Javier Tusell, dated 22 November 1980
Philadelphia, 15 April 1945 - Institutional correspondence Madelin Blitzstein's letter to Pablo Picasso
Exhibition, Museo Nacional Centro de Arte Reina Sofía, Madrid, January 21 – May 4, 2015 - Exhibition Daniel G. Andújar, Operating System