G. Hugnet, "In the Light of Surrealism," The Bulletin of The Museum of Modern Art, November-December 1936, p. 22.
K. Kuh, Art Has Many Faces: The Nature of Art Presented Visually, New York, 1951, p. 150 (illustrated, p. 151).
K. Kuh, "Art's Voyage of Discovery," Saturday Review, 29 August 1964, p. 150 (illustrated).
C. Geelhaar, Paul Klee and the Bauhaus, Greenwich, Connecticut, 1973, p. 66.
M. Vishny, "Paul Klee's Self-Images," Psychoanalytic Perspectives on Art, London, 1985, vol. 1, p. 151.
Berlin, Galerie Der Sturm, Paul Klee, Hans Mattis Teutsch: 99 Ausstellung, July-August 1921, no. 37.
Munich, Glaspalast, Neue Mnchner Secession, 1922, no. 70.
Munich, Galerie Neue Kunst Hans Goltz, Paul Klee, Zweite Gesamtausstellung 1920-1925, May-June 1925, no. 49.
Lucerne, Kunstmuseum, Thse, Antithse, Synthse, February-March 1935, no. 59.
New York, The Museum of Modern Art, Fantastic Art, Dada, Surrealism, December 1936-January 1937, p. 216, no. 234 (illustrated).
New York, M. Knoedler & Co., Inc., Lawyers Collect, January 1965. New York, Sidney Janis Gallery, Early 20th Century European Masters, March-April 1987, no. 28.