1. Opticks;Newton,1704
2. Zur Farbenlehre, Tuebingen;Von Goethe,1810
3. On the Theory of Light and Color;Young;Philosophical Transactions,1820
4. Theory of the Perception of Colors;Maxwell;Transactions of the Royal Scottish Society of Arts,1856
5. Handbuch der Physiologischen Optik;Helmholtz,1867