1. Atkinson, J., Review of human visual development: crowding and dyslexia, in Vision and Visual Dyslexia, London: Macmillan, 1991, p.44.
2. Flom, M.C., Contour interaction and the crowding effect, Probl. Optom., 1991, vol. 3, no. 2, p.237.
3. Pelli, D.G., Palomares, M., and Majaj, N.J., Crowding is unlike ordinary masking: distinguishing feature detection and integration, J. Vision, 2004, vol. 4, p. 1136.
4. Strasburger, H., Unfocussed spatial attention underlies the crowding effect in indirect form vision, J. Vision, 2005, vol. 5, no. 11, p. 1024.
5. Danilova, M V. and Bondarko, V.M., Foveal contour interactions and crowding effects at the resolution limit of the visual system, J. Vision, 2007, vol. 7, no. 2, p.1.