Marianne Aav, Rosa Barovier Mentasti and Gordon Bowyer, et al., Tapio Wirkkala - eye, hand and thought, exh. cat., Museum of Art and Design, Helsinki, 2000, pp. 283 and 380; Judith Gura, Scandinavian Furniture: A Sourcebook of Classic Designs for the 21st Century, London, 2007, p. 39 for a similar example