1. Aristotle. (1932). Pol: Politics (H. Rackham, Trans.). In Aristotle XXI (Loeb classical library). Cambridge, MA: Harvard University Press.
2. Aristotle. (1984). NE: Nicomachean ethics (W. D. Ross, Trans.). In J. Barnes (Ed.), The complete works of Aristotle (Vol. 2, pp. 1729–1867). Princeton: Princeton University Press.
3. Armstrong, D. M. (1983). What is a law of nature? Cambridge: Cambridge University Press.
4. Blackburn, S. (1998). Ruling passions. A theory of practical reasoning. Oxford: Oxford University Press.
5. Churchland, P. (1981). Eliminative materialism and propositional attitudes. Journal of Philosophy, 78, 67–90.