1. Dorland's Illustrated Medical Dictionary, 25th ed. Philadelphia: Saunders, 1974.
2. Hippocrates, vol. II, Loeb Classical Library. Cambridge, Massachusetts: Harvard University Press, 1981.
3. Wulff HR, Andur Pedersen S, Rosenberg R.Philosophy of Medicine: An Introduction. Oxford: Blackwell Scientific Publications, 1986.
4. Dawes RB, Faust D, Meehl PE. Clinical versus actuarial judgment.Science 1989;243:1668?74.
5. Hempel CG.Philosophy of Natural Science. Englewood Cliffs, NJ: Prentice-Hall, Foundations of Philosophy Series, 1966.