1. Anscombe GEM (1981) Causality and determination. In: Collected philosophical papers, vol. II. Metaphysics and the philosophy of mind, Basil Blackwell, Oxford
2. Aquinas St. T (1963) Commentary on Aristotle’s Physics (trans: Blackwell RJ, Spath RJ, Thirkell WE). Routledge & Kegan Paul, London
3. Aquinas St. T (1975) Summa contra gentiles book 3 part 1 (trans: VJ Bourke) Notre Dame University of Notre Dame Press, Notre Dame
4. Armstrong DM (1978) A theory of universals. CUP, Cambridge
5. Armstrong DM (1983) What is a law of nature? CUP, Cambridge