Photo, 1968 Rotraut in front of the Relief Portrait of Arman (PR 1) during the exhibition "Yves Klein", Louisiana Museum
Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Exhibition, 11 Apr 1961 - 29 Apr 1961 Yves Klein le monochrome Leo Castelli Gallery, New York, United States