1. Ashton W.D.:The logit transformation, Griffin, London, 1972.
2. Derman C.: Non-parametric up-and-down experimentation.Ann. Math. Stat. 28, 795–797, 1957.
3. Falmagne J.P.:Elements of Psychophysical Theory. Oxford University Press, New-York, 1985.
4. Gescheider G.A.:Psychophysics method, theory and application, 2 ed., Lawrence Erlbaum Ass, Hillsdale, 1985.
5. Gracely R.H.: Studies of pain in human subjects.In: Wall P., Melzack R. (Eds), Textbook of Pain, 4th ed., Churchill-Livingstone, Hong Kong, 385–408, 1999.