Charlotte and Peter Fiell, 1000 Chairs, Cologne, 1997, p. 299; Christoffer Harlang, Keld Helmer-Petersen and Krestine Kjærholm, Poul Kjærholm, Copenhagen, 1999, pp. 13 and 173 and p. 11 for a drawing; Michael Sheridan, The Furniture of Poul Kjærholm: Catalogue Raisonné, New York, 2007, pp. 36-39