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2. Doerner, Max (1984), The Materials of the Artist and Their Use in Painting: With Notes on the Techniques of the Old Masters, New York: Harcourt Brace Jovanovich.
3. Chevreul, Michel Eugène (1890), The Principles of Harmony and Contrast of Colors, London: George Bell and Sons.
4. Gompertz, Will (2012), What Are You Looking At?: 150 Years of Modern Art, London: Viking.
5. Ball, Philip (2008), Bright earth : art and the invention of color, London: Vintage.