V. Hugo, "Le verger de Paul Klee" in Cahiers d'Art, 1945-1946, nos. 20-21, p. 65 (illustrated).
H. Devree, "The Magic of Klee" in The New York Times, 7 May 1950 (illustrated).
F.C. Schang, Paul Klee, Collection of F.C. Schang, South Norwalk, 1952, no. 38.
F.C. Schang, Paul Klee, Collection of F.C. Schang, South Norwalk, 1953, no. 38.
W. Grohmann, Paul Klee, New York, 1954, pp. 404 and 419, nos. 163 and 371 (illustrated, p. 404).
F.C. Schang, Paul Klee, Collection of F.C. Schang, South Norwalk, 1955, no. 34.
G. di San Lazzaro, Klee: A Study of His Life and Work, London, 1957, p. 276 (illustrated, pl. 121).
F.C. Schang, Paul Klee, Collection of F.C. Schang, South Norwalk, 1957, no. 40.
F.C. Schang, Paul Klee, Collection of F.C. Schang, South Norwalk, 1959, no. 34.
M. Huggler, Paul Klee: Die Malerei als Blick in den Kosmos, Zürich, 1969, p. 170.
D. Chevalier, Klee, New York, 1971, p. 80 (illustrated in color, p. 81).
J. Glaesemer, Paul Klee: Die farbigen Werke im Kunstmuseum Bern–Gema¨lde, farbige Bla¨tter, Hinterglasbilder und Plastiken, Bern, 1976, p. 324, note 29.
M. Henle, ed., Vision and Artifact, New York, 1976, pp. 132 and 145.
J. Smith Pierce, Paul Klee and Primitive Art, New York, 1976, pp. 51 and 166, note 62.
G. Monnier, Le Pastel, Geneva, 1983, p. 87 (illustrated in color, p. 86).
A. Bonfand, Paul Klee, l'oeil en trop, Paris, 1988, pp. 100-102 (illustrated in color, pl. 49).
The Paul Klee Foundation, ed., Paul Klee: Catalogue Raisonné 1934-1938, Bern, 2003, vol. 7, p. 271, no. 7103 (illustrated).