1. Ablondi, F. (2002). Kelly and McDowell on perceptual content. Electronic Journal of Analytic Philosophy, 7.
2. Armstrong, D. M. (1968). A materialist theory of the mind. London: Routledge.
3. Ayers, M. (2002). Is perceptual content ever conceptual? Philosophical Books, 43(1), 5–17.
4. Ayers, M. (2004). Sense experience, concepts, and content—Objections to Davidson and McDowell. In R. Schumacher (Ed.), Perception and reality: From descartes to the present. Paderborn: Mentis.
5. Audi, R. (1986a). Acting for reasons. The Philosophical Review, 95(4), 511–546.