1. Aertsen, J. A. (1988). Nature and creature: Thomas Aquinas’s way of thought. Leiden: Brill.
2. Alanen, L. (1985). Descartes, Duns Scotus and Ockham on Omnipotence and Possibility. Franciscan Studies, 45, 157–188.
3. Aristotle. (1963). De Interpretatione, in idem: Aristotle’s Categories and de Interpretatione (J. Ackrill, Trans. and Ed.). Oxford: Clarendon Press. (cited as De Int.).
4. Aristotle. (1956). Metaphysics (J. Warrington, Trans. and Ed.). London: Dent. (cited as Met.).
5. Aristotle. (1995). Physics, Books I and II (W. Charlton, Trans.). Oxford: Clarendon Press. (cited as Phys.).