E. Ambasz, Italy: The New Domestic Landscape: Achievements and Problems of Italian Design, exhibition catalogue, The Museum of Modern Art, New York, 1972, p. 106 for another lamp of this model;
H. Höger, Ettore Sottsass Jun. Designer, Artist, Architect, Tübingen, 1993, p. 90 for another lamp of this model;
F. Ferrari, N. Ferrari, Luce: Lampade 1968-1973: il nuovo design italiano, Turin, 2002, pl. 153 for another lamp of this model.