Document, 1957 Poster for the double exhibition ‘Propositions monochromes’ at Galerie Iris Clert and Galerie Colette Allendy
Document, 1961 Sacha Sosnovsky, "Trends in New Realism in Nice", article published in Sud Communications
Document, 1960 Pierre Restany, "Yves Klein Le Monochrome: le nouveau réalisme de la couleur", text written for the exhibition "Yves Klein le monochrome: Il Nuovo Realismo del Colore" at the Galleria Apollinaire in Milan
Document, 1955 Letter from Yves Klein to Jacques Tournier, author of the weekly "Les Nouvelles littéraires, artistiques et scientifiques".