Literature
P. Wember, Yves Klein, Cologne 1969, no. RP7 (the prototype illustrated, p. 137).
P. Restany, Yves Klein, New York 1982 (another from the edition illustrated, p. 226).
Yves Klein, exh. cat., Paris, Centre Georges Pompidou Musée National d'Art Moderne, 1983 (another from the edition illustrated in colour, p. 109).
J.-P. Ledeur, Yves Klein, Catalogue raisonné des éditions et sculptures éditées, Knokke-le-Zoute 2000, no. RP7 (another from the edition illustrated in colour, p. 242).
H. Weitemeier, Yves Klein 1928-1962 International Klein Blue, Cologne 2001 (another from the edition illustrated in colour, p. 83). Yves Klein, exh. cat., Lugano, Museo d'Arte della Città di Lugano, 2003 (another from the edition illustrated in colour, p. 149).