1. Earman, John,A Primer on Determinism, Dordrecht: D. Reidel Publ. Co. (1986).
2. Levin, Michael E.,Metaphysics and the Mind-Body Problem, Oxford: Oxford University Press (1979).
3. Popper, Karl R., “Of Clouds and Clocks” (1965) reprinted inObjective Knowledge, Oxford: Oxford University Press, (1972).