1. Armstrong, D. (2003). Truthmakers for modal truths. In H. Lillehammer & G. Rodriguez-Pereyra (Eds.), Real metaphysics (pp. 12–24). London: Routledge.
2. Armstrong, D. (2004). Truth and truthmakers. Cambridge: Cambridge University Press.
3. Bigelow, J. (1988). The reality of numbers. Oxford: Clarendon Press.
4. Bigelow, J. (1996). Presentism and properties. In E. T. James (Ed.), Philosophical Perspectives (Vol. 10, pp. 35–52). Cambridge, MA: Blackwell.
5. Bourne, C. (2006). A theory of presentism. Canadian Journal of Philosophy, 36, 1–23.