1. Fischer J. M. (1994) Metaphysics of free will. Blackwell, Cambridge
2. Frankfurt H. (1969) Alternate possibilities and moral responsibility. The Journal of Philosophy, 66(23): 829–839
3. Hunt, D. (2006). Freedom, foreknowledge and Frankfurt. In D. Widerker & M. McKenna (Eds.). Moral responsibility and alternative possibilities (pp. 159–183). Burlington: Ashgate Publishing Limited.
4. Hunt, D. (2001). The simple-foreknowledge view. In J. K. Beilby & P. R. Eddy (Eds.), Divine foreknowledge: Four views (pp. 65–103). Downers Grove: InterVarsity Press.
5. McKenna, M. (2009). Compatibilism. Stanford encyclopedia of philosophy. Retrieved December 15, 2010, from http://plato.stanford.edu/entries/compatibilism/ .