Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Artwork, 1962 Transfer of a Zone of Immaterial Pictorial Sensibility to Claude Pascal. Series n°1, Zone 06
Document, 1957 Invitation card for the double exhibition "Yves Klein: Propositions monochromes" at the Iris Clert and Colette Allendy Galleries
Photo, 1959 International collaboration between artists and architects in the realisation of the new Gelsenkirchen Opera House