1. Aquinas, T. (1947). Summa theologica. (Translated by The Fathers of the English Dominican Province) Benzinger Bros. edition, New York.
2. Baker, A. (2013). Simplicity. In: E. N. Zalta (ed.), The Stanford encyclopedia of philosophy, Fall 2013 edn.
3. Carroll, S. (2012). Does the universe need God? In J. B. Stump & A. G. Padgett (Eds.), The Blackwell companion to science and Christianity (pp. 185–197). Chichester: Wiley.
4. Dawes, G. (2009). Theism and explanation. New York: Routledge.
5. Dawkins, R. (2006). The God delusion. London: Bantam Press.