Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Document, 1957-1959 Yves Klein, "Règles rituelles de la cession des zones de sensibilité picturale immatérielle"
Document, 1957 Invitation card for the double exhibition "Yves Klein: Propositions monochromes" at the Iris Clert and Colette Allendy Galleries
Document, 1957 Invitation card of the exhibition, "Yves Klein : Proposte monocrome, epoca blu", Galleria Apollinaire, 1957