1. Anscombe, G.E.M.: Causality and Determinism. Inaugural Lecture delivered at Cambridge. Cambridge: Cambridge University Press, 1971.
2. Anscombe, G.E.M.: Soft Determinism. In G. Ryle (Ed.), Contemporary Aspects of Philosophy. London: Oriel Press, 1976.
3. Aune, B.: Hypotheticals and Can: Another Look. Analysis, 27, No. 6 (June 1967): 191–195.
4. Aune, B.: Free Will, Can’, and Ethics: A Reply to Lehrer. Analysis, 30, No. 3 (January 1970): 77–83.
5. Austin, J.L.: Ifs and Cans. Philosophical Papers, second edition, pp. 205–232.Oxford: Oxford University Press, 1970.