São Paulo, 28 January 1953 - Institutional correspondence A letter from Maria Martins to Francisco Matarazzo Sobrinho
Paris, 17 November 1959 - Institutional correspondence A letter from the Groupe d'étudiants d'espagnol to Pablo Picasso
Whitechapel Gallery, London, 14 March 2010 - Performance 119-minute circle. The International Congress at the Whitechapel Gallery