New York, 3 September 1981 - Internal institutional documents Inventory and conservation report on the works collected by New York's Museum of Modern Art to be sent to Spain
Madrid, 22 September 1936 - Institutional correspondence Francisco Sánchez Cantón's telegram to Pablo Picasso
<em>Marxist Perspectives</em>, New York, vol. 1, no. 4 (winter, 1978): 28–51 - Article “The Museum of Modern Art as Late Capitalist Ritual: An Iconographic Analysis”
New York, 8 September 1981 - Internal institutional documents A confidential and private document signed by Álvaro Martínez-Novillo and José María Cabrera in New York