The work is documented by the gallery "La casa dell'arte", a cultural and information centre in Sasso Marconi (BO); cited on page 8 of the catalogue "Engravings - drawings - oils from 14 October to 12 November 1978".
On the back of the work there is a label with the name of the gallery mentioned above, where there is general information, and also evidence of participation in the exhibition of November 1978, and the number 1138 of the trade register.
It is also in possession of a transfer document, issued by the same gallery on 18 November 1979, bearing the same information as on the label on the back of the work, stamped and signed by the gallery director Liliana Guidi.