Article, 1962, Pierre Restany Testimonial: Yves Klein just died... Text written on June 9, 1962, Cimaise, No. 60, July-August 1962
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
Article, 1981, Pierre Restany Testimonial of Pierre Restany on Yves Klein Excerpt from "Yves Klein e la mistica si Santa Rita da Cascia", Editoriale Domus Editions, Milan, Italy, 1981