Giuliana Gramigna, Repertorio 1950/1980, Milan, 1985, p. 263; Fulvio and Napoleone Ferrari, Light: Lamp 1968-1973: The New Italian Design, Turin, 2002, p. 34, no. 26; Charlotte and Peter Fiell, eds., 1000 Lights, Vol. 2: 1960 to Present, Cologne, 2005, p. 133; Charlotte and Peter Fiell, eds., Domus Vol. VI 1965-1969, Cologne, 2006, p. 437 for a similar example