1. Ainslie, George (2001). The breakdown of will. Cambridge: Cambridge University Press.
2. Calvin, William (1990). The cerebral symphony: Seashore reflections on the structure of consciousness. New York: Bantam.
3. Coleman, Mary (2001). Decisions in action: Reasons, motivation, and the connection between them. Ph.D. dissertation, Philosophy Department, Harvard University.
4. Dennett, Daniel C. (1984). Elbow room: The varieties of free will worth wanting. Cambridge, MA: Bradford Books/MIT Press and Oxford University Press
5. Dennett, Daniel C. (1991). Consciousness explained. Boston: Little, Brown