1. Aquinas, T. (1273/1947). Summa Theologica, the Fathers of the English Dominican Province (trans.). New York: Benziger Brothers.
2. Bliss, R., & Trogden, K. (2014). ‘Metaphysical grounding’. In Zalta, E.N. (Ed.), The Stanford encyclopedia of philosophy. < http://plato.stanford.edu/archives/win2014/entries/grounding/ >.
3. Brower, J. E. (2008). Making sense of divine simplicity. Faith and Philosophy, 25, 3–30.
4. Brower, J. E. (2009). Simplicity and aseity. In T. P. Flint & M. C. Rea (Eds.), Chapter 5 of the Oxford Handbook of philosophical theology. Oxford: Oxford University Press.
5. Cameron, R. P. (2009). Intrinsic and extrinsic properties. In R. Le Poidevin (Ed.), Chapter 26 in the Routledge companion to metaphysics (pp. 265–275). Bodmin: Routledge.