References
- Aristotle. (1941). Posterior Analytics (G. R. G. Mure, Trans.). In R. P. McKeon (Ed.), The Basic Works of Aristotle. New York: Random House.
- C.G.Hempel Aspects of Scientific Explanation and Other Essays in the Philosophy of Science 1965 The Free Press New York
- Hume, D. (1949). A Treatise on Human Nature. London: J M Dent & Sons, Ltd, 1949 (originally published 1738).
- W.A.Wallace Galileo and His Sources 1984 Princeton University Press Princeton, NJ