1. Armstrong, D. M. (1978). Universals and scientific realism: A theory of universals. Cambridge University Press.
2. Armstrong, D. M. (1983). What is a law of nature? Cambridge University Press.
3. Audi, P. (2012). A clarification and defense of the notion of grounding. In F. Correia & B. Schnieder (Eds.), Metaphysical grounding: Understanding the structure of reality (pp. 101–121). Cambridge University Press.
4. Austin, C., & de la Rosa, L. (2018). Dispositional properties in evo-devo. In L. de la Rosa & G. Müller (Eds.), Evolutionary developmental biology. Springer.
5. Ayer, A. J. (1956). What is a law of nature? Revue Internationale de Philosophie, 10(36), 144–165.