Signature, archive and stamp of the artist on the back. Signature and Archive of the Artistica on Photography. Authentication by the Orler Gallery of Favaro Veneto. Work published on page 38 of the Catalogue of the Exhibition Vincenzo Balsamo "L'Astrazione Lirica" 1987-2012 edited by Giovanni Faccenda, De Luca Editori d'Arte held at the Chiostro del Bramante in Rome