Martina Margetts, Tord Boontje, New York, 2006, p. 10 for a cardboard prototype and p. 265; Robert Kianten, Sophie Lovell and Birga Meyer, eds, Furnish: Furniture and International Design for the 21st Century, Berlin, 2007, p. 174; Sophie Lovell, Limited Edition: Prototypes, One-Offs and Design Art Furniture, Basel, 2009, p. 176