References
- Alston, William 1996. A Realist Conception of Truth. Ithica: Cornell University Press.
- Bhaskar, Roy 1975. A Realist Theory of Science. Leeds: Leeds Books.
- Herbert, Nick 1987. Quantum Reality: Beyond the New Physics. Garden City: Anchor.
- Wolf, Fred Alan 1988. Parallel Universes: The Search for Other Worlds. New York: Touchstone.