1. Visual Psychophysics;E Aulhorn,1972
2. Enoch JM. Physiology. In Sorsby A (ed): Modern Ophthalmology, Vol. I. Basic Aspects. Butterworth, London, 1963.
3. Enoch JM. First interprofession standard for visual field testing: report of working group 39. Adv Ophthalmol 1980;40:173–224.
4. Fechner GT. Elemente der Psychophysik. Breitkopf & Hartel, Liepzig; 1860. English transation of Vol. I. HE Adler (trans); DH Howes, EG Boring (eds). Holt, Rinehard, Winston, New York, 1966.
5. Boring EG. A History of Experimental Psychology. 2nd Ed. Appleton, New York, 1950.