R. Crone, Andy Warhol, New York 1970, p. 298, #292-301; K. McShine, Andy Warhol: A Retrospective, New York 1989, p. 310 (illustrated); V. Bockris, Warhol: The Biography, London 1989, pp. 281-82, 387; D. Bourdon, Warhol, New York 1989, pp. 263-65; B.Colacello, Holy Terror: Warhol Close-Up, New York 1990, pp. 92-95; D. Hickey and C. Schoor, All Tomorrow''s Parties: Billy Name''s Photographs of Andy Warhol''s Factory, London 1997, p.141 (illustration of the present lot in Warhol's studio in 1968); M. Francis & M. King, The Warhol Look, Pittsburgh 1997, pp. 278-79; S. Chermayeff, "Frederick W. Hughes: AndyWarhol''s Man of Style," in J. Smith, ed., Possession Obsession: Andy Warhol and Collecting, Pittsburgh, 2002, pp. 104-111; p. 109 (illustration of the present work in the townhouse owned and occupied by Andy Warhol from 1967-1987 and then by Frederick W. Hughes until 2001); G. Frei and N. Printz, eds., Andy Warhol: Catalogue Raisonné of Paintings andSculpture, 1964-69, Vol. 02B, New York, 2004, Cat. No. 2093.6, p. 387, 395, and 404