1. A.R. Anderson, The formal analysis of normative systems, in:The Logic of Decision and Action, ed. N. Rescher (Pittsburgh, 1966).
2. N. Belnap, Backwards and forwards in the modal logic of agency, unpublished manuscript, Department of Philosophy, University of Pittsburgh (1989). Forthcoming in Philos. Phenomen. Res. in early 1993.
3. N. Belnap, Declaratives are not enough, Philos. Studies 59(1990)1.
4. N. Belnap, Before refraining: concepts for agency, Erkenntnis 34(1991)137.
5. N. Belnap and M. Perloff, Seeing to it that: A canonical form for agentives, Theoria 54(1988)175.