1. Aristotle (1947). De anima. In R. McKeon (Ed.), Introduction to Atistotle (pp. 163-329). New York: Random House.
2. Aristotle (1961). Metaphysics. (W. Warrington, Trans.). New York: Dutton.
3. A dynamical model of the meaning of information
4. Bertalanffy, L von (1952). P m b h of life. London: Watts.
5. Blumenfeld, D. (1981). Leibniz's theory of the striving possibles. In R. Woolhouse (Ed.) kibniz: Metaphysics rmd philosophy of science (pp. 77-88). Oxford, England: Oxford University Press.