Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Document, 1959 Yves Klein, Text following the exhibition Motion in Vision / Vision in Motion, Hessenhuis
Document, 1957 Poster for the double exhibition "Yves Klein, Propositions Monochromes" at Galerie Iris Clert and Galerie Colette Allendy