1. Hardy-Wurzburg: “The Theory of the Three-Color reproduction”,Iosa 27, Nr. 7, July 1937, p. 227–240.
2. MacAdam: “Photographic aspects of the theory of three color reproduction”,Josa 28, Nr. 11, Nov. 1938, p. 399–418.
3. Tobias: “A Colour Correction Process”, Taga Proc., May 1954, p. 85–90.
4. Haynes: “The RCA-Interchemical All Electronic Colour Correction System”,Penrose Annual 46, 1952, p. 83–86.
5. Cartwright: “The Belin System of Colour Correction”,Penrose Annual 1955, p. 83–87.