P. Comte, Klee, Paris, 1989, pp. 90 and 254 (recto and verso illustrated in color, p. 91, figs. 115-116).
Paul Klee, His Life and Works, London, 1994, p. 44 (recto detail illustrated in color).
J. Anger, Modernism and the Gendering of Paul Klee, Ann Arbor, 1997, pp. 120 and 357.
J.-L. Ferrier, Paul Klee, Paris, 1998, p. 49 (recto illustrated in color, p. 48; with incorrect medium).
O. Okuda, "Versinkende Villen-aufsteigende Baracken. Paul Klee und die Bauhaus-Debatten über den Konstruktivismus" in Aufstieg und Fall der Moderne, exh. cat., Kunstsammlungen zu Weimar, 1999, p. 336 (verso illustrated, p. 336, fig. 135).
The Paul Klee Foundation, ed., Paul Klee: Catalogue Raisonné 1919-1922, Bern, 1999, vol. 3, p. 94, no. 2167 (recto and verso illustrated; recto illustrated again in color, p. 65).
J. Anger, Paul Klee and the Decorative in Modern Art, Cambridge, 2004, pp. 116, 224 and 272, note 60.
F. Graboleda, Cuerpo simbólico en Paul Klee, Madrid, 2007, pp. 222-225 (recto illustrated in color, p. 223).
F. Eggelhöfer, A Collector's Eye on Paul Klee, exh. cat., Zentrum Paul Klee, Bern, 2008, p. 20.