Zao Wou-Ki (1921-2013), Hortensias , 1953, lithograph in colours, signed, dated [19]53 and numbered artist's proof , 43.5x57.5 cm Bibliography: Jorgen Agerup, Zao Wou-ki, The Graphic Work, A Catalogue Raisonné 1937-1995, ed. Heede&,Moestrup, p. 58, fig. 82, ill. Yeves Rivière, Zao Wou-ki, Les Estampes, 1937-1974, ed. Arts et Métiers Graphiques, p. 52, n. 84, ill.