1. Anscombe, G., and M. Elizabeth. 1971. Causality and Determination. Cambridge: Cambridge University Press
2. rep. in [Sosa and Tooley 1993, 88-104].
3. Apostol, Tom M. 1969. Calculus. New York: Wiley, 2nd ed.
4. Aristotle. 1831. Opera (Ed. Immanuel Bekker). Berlin: G. Reimerum.
5. Aristotle. 1950. Physica. Oxford: Clarendon, 1950, 1988; also in [Aristotle Op., 184–267].