Hans Höger, Ettore Sottsass JR: Designer, Artist, Architect, Berlin, 1993, p. 25 for a drawing and p. 176; Fulvio Ferrari, Ettore Sottsass Tutta la Ceramica, Turin, 1996, p. 168, fig. 757
c. 1969 Glazed ceramic. 23.5 x 27 x 27 cm (9 1/4 x 10 5/8 x 10 5/8 in) Distributed by the Design Centre/Poltronova, Italy. From the Yantra Di Terracotta series. Underside signed in marker with 'SOTTSASS/Y / 11'.