Article, 1961, Roland F. Pease Jr. Press article by Roland F. Pease, Jr. on the blue monochromes seen at the Leo Castelli exhibition, New-York Published in the magazine Art international, June 1961
Article, 1981, Pierre Restany Ex-voto, St. Rita da Cascia Excerpt from the book "Yves Klein e la mistica di Santa Rita da Cascia", Editoriale Domus
