São Paulo, 4 March 1953 - Institutional correspondence Arturo Profili's letter to Paulo E. de Berrêdo Carneiro, dated 4 March 1953
São Paulo, 3 August 1953 - Institutional correspondence Arturo Profili's letter to Paulo E. de Berrêdo Carneiro, dated 3 August 1953
<em>The New York Times</em>, New York, November 11, 1990, 1, 39 - Article “When Picasso Spooked the FBI”