Artwork, 1959 Receipt to Peppino Palazzoli for transfert of a Zone of Immaterial Pictorial Sensibility. Series n°1, Zone n°01
Photo, October 15 1955 Bernadette Allain at the opening of the exhibition "Yves: paintings", Lacoste Publishing - Club des Solitaires
Artwork, 1959 Receipt to Jacques Kugel for transfert of a Zone of Immaterial Pictorial Sensibility. Series n°1, Zone n°02