References
- Damasio, A. R.1994. Descarte's Error: Emotion, Reason and the Human Brain. New York: GP Putnams' & Sons.
- Gregory, Richard L.1997. Eye and Brain: The Psychology of Seeing. 5th ed., 150–151. Princeton, NJ: Princeton University Press.
- Richardson, S., H. L.Chan, A.Lee, and S. T.Teo. 1972. “The Müller–Lyer Illusion: A Cross-Cultural Study in Singapore.” Ergonomics15 (3): 293–298.