'Nuovi disegni di Tapio Wirkkala', Domus, no. 341, April 1958, pp. 45-48 for similar examples
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, p. 281, figs. 474-75 for similar examples, p. 283, fig. 479 for the 'Rhythmic Plywood', p. 380 for a similar example