1. Alexander, H. G. (Ed.). (1956). The Leibniz–Clarke correspondence. Manchester: Manchester University Press. (originally written by Leibniz, G.W. & Clarke, S. in 1715–16 and published by Clarke, S. in 1717.).
2. Armstrong, D. (1978). A theory of universals: Volume 2. Cambridge: Cambridge University Press.
3. Armstrong, D. (1988). Are quantities relations? A reply to bigelow and pargetter. Philosophical Studies, 54, 305–316.
4. Arntzenius, F. (2000). Are there really instantaneous velocities? The Monist, 83(2), 187–208.
5. Arntzenius, F. (2012). Space, time, & stuff. Oxford: Oxford University Press.