title: Revealing the sfumato technique of Leonardo da Vinci by X-ray fluorescence spectroscopy.
authors.affiliation: Centre de Recherche et de Restauration des Musées de France, CNRS-UMR 171, Palais du Louvre, 14 quai François Mitterrand, 75001 Paris, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: de Viguerie
authors.forename: Philippe
authors.initials: P
authors.lastname: Walter
authors.forename: Eric
authors.initials: E
authors.lastname: Laval
authors.forename: Bruno
authors.initials: B
authors.lastname: Mottin
authors.forename: V Armando
authors.initials: VA
authors.lastname: Solé