1. and , Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd ed., Wiley, New York, 1982, p. 10, Fig. 3(1.2.1).
2. Opticks: Or, a Treatise of the Reflexions, Refractions, Inflexions and Colours of Light, 1st ed., Smith and Walford, London, 1704;
3. Opticks: Or, a Treatise of the Reflexions, Refractions, Inflexions and Colours of Light, Dover Publications, New York, 1952.
4. Handbuch der physiologischen Optik, 1st ed., Voss, Hamburg, 1867.