Maurizio Fagiolo, La ragion pura-pratica di Lichtenstein, 1965, pl. 3, illustrated; Bruno Alfieri, "The Arts Condition - Pop Means 'Not Popular'," Metro 9, April 1965, cat. no. 9, illustrated in color; Alberto Boatto and Giordano Falzoni, eds., Lichtenstein, Rome, 1966, p. 59, illustrated; Edward Fry, "Roy Lichtenstein's Recent Landscapes," Art and Literature, Spring 1966, cat. no. 8, illustrated; Ugo Mulas and Alan R. Solomon, New York: The New Art Scene, New York, 1967, pp. 170-171; Jean-Christophe Ammann and Wim Beeren, Roy Lichtenstein, Bern, 1968, cat. no. 44, n.p. illustrated; Maria Netter, Comics und Abstraktion, Bern, 1968, no. 1790, p. 29, illustrated in color; Diane Waldman, Roy Lichtenstein, New York, 1971, p. 82, illustrated in color; Phyllis Tuchman, "American Art in Germany: The History of a Phenomenon," Artforum 9, November 1970, cat. no. 3, p. 29, illustrated; Jean-Claude Meyer, "Les illusions optiques de Roy Lichtenstein," XXe siècle, n.s., December 1973, cat. no. 41, p. 88, illustrated; Exh. Cat., Valencia, California Institute of the Arts, Drawings and Collages from the Artist's Collection, April - May 1977, cat. no. 9, p. 12 illustrated; Museum Ludwig and Siegfried Gohr, Paintings, Sculptures, Environments from Expressionism to the Present Day, Munich, 1986. cat. no. 152, p. 192, illustrated in color; Janis Hendrickson and Roy Lichtenstein, Roy Lichtenstein, Cologne, 1994, p. 17, illustrated in color