1. Adams, R. M. (1981). Actualism and thisness. Synthese, 49, 3–41.
2. Barwise, J., & Perry, J. (1983). Situations and attitudes. Cambridge: Bradford Books, MIT Press.
3. Davies, M., & Humberstone, I. L. (1980). Two Notions of Necessity. Philosophical Studies, 38, 1–30.
4. Divers, J. (2002). Possible worlds. London: Routledge.
5. Divers, J. (2014). The modal status of the Lewisian analysis of modality. Mind, 123, 861–872.