Domus, no. 108, December 1936, p. 36 for a floor version of the model
Laura Falconi, Fontana Arte: Una storia trasparente, Milan, 1998, p. 73 for a floor and wall mounted version of the model, p. 206 for a floor version of the model
Franco Deboni, Fontana Arte: Gio Ponti, Pietro Chiesa, Max Ingrand, Turin, 2012, fig. 97 for a floor and wall mounted version of the model
Sergio Montefusco, Fontana Arte: repertorio 1933-1943 dalle immagini dell’epoca, Genoa, 2012 p. 168 for a floor version of the model, p. 262 for a floor and wall mounted version of the model