Wright, Chicago, 'Modernist 20th Century', 5 December, 2004, lot 141
'Guglielmo Ulrich: Milanese Design between Classicism and Modernism', Doris Leslie Blau Ltd., New York, 21 May-9 July, 2004
Guglielmo Ulrich: Milanese Design between Classicism and Modernism, exh. cat., Doris Leslie Blau Ltd., New York, 2004, no. 27 for a drawing
Luca Sacchetti, Guglielmo Ulrich, Milan, 2009, p. 416, fig. 383 for a similar example