1. Barry Smith, “An Essay on Material Necessity”, in P. Hanson and B. Hunter (eds.), Return of the A Priori, Canadian Journal of Philosophy, Supplementary Volume 18 (1992).
2. Barry Smith, and Achille Varzi, “Environmental Metaphysics,” in Metaphysics in the Post-Metaphysical Age, eds. P. M. Simons and Uwe Meixner (Vienna: Hölder–Pilcher–Tempsky, 2001), pp. 231–40.
3. Berit Brogaard, and Barry Smith, “Sixteen Days,” Journal of Medicine and Philosophy, 28 (2003), pp. 45–78.
4. Bertrand Russell, The Analysis of Matter (New York: Dover, 1954, 1st ed. 1927).
5. Bertrand Russell, Logic and Knowledge, ed. R. C. Marsch (London: George Allen & Unwin, 1956).