Dietmar Elger (ed.), Gerhard Richter, Catalogue Raisonné, Volume 2, nos. 199-388, 1968-1976, Ostfildern 2017, p. 514, no. 339/6 (color illu.). Jürgen Harten, Dietmar Elger, Gerhard Richter, Bilder 1962-1985, Colognne 1986, pp. 40 and 382 (illu. p. 162, errnoeous caption no. 339/4). Bruno Corà (ed.), Gerhard Richter, Prato 1999, pp. 16, 18, 30, 31, 164 and 174 (on the red, blue and yellow pictures in general) Dietmar Elger, Gerhard Richter. Maler, Cologne 2002, pp. 268f (on the red, blue and yellow pictures in general). "..Red - Blue - Yellow..: Pictures that emerge from the process. Three basic colors as a starting point for infinite chains of hues.." Gerhard Richter, quoted from: Jean-Christoph Ammann, on Gerhard Richter. In: ex. cat. Lenbachhaus, Munich 1973, no p. "pictures in which the artist minimizes his subjective creative decisions, allows neither composition nor illusionism, conveys no content and thus obtains pictures that "stand up entirely for themselves." Dietmar Elger, Gerhard Richter. Maler, Cologne 2002, p. 269. Called up: June 7, 2024 - ca. 17.12 h +/- 20 min.