Signature on the right side. On the reverse: signature and stamp of Bottega Gatti, Faenza. Certificate of authenticity Galleria Enrico Astuni, Bologna. Exhibition: 2000, Carla Accardi Pietrose distances, Fano, 24 June - 6 August (reprinted from the exhibition catalog edited by Achille Bonito Oliva, Galleria Astuni, Edizioni Esssegi pl. 33).