1. Baldwin, T. (1992) ‘The Projective Theory of Sensory Content’, in Crane, T. (ed.) The Contents of Experience, (Cambridge University Press.)
2. Block, N. (2003) ‘Mental Paint’, in Reflections and Replies: Essays on the Philosophy of Tyler Burge, eds. Hahn, M. and Ramberg, B. (Cambridge, MA: MIT Press).
3. Boghossian, P. and Velleman, J.D. (1989) ‘Color as a Secondary Quality’, Mind 98, 81-103.
4. Bonjour, L. and Sosa, E. (2003) Epistemic Justification: Internalism vs. Externalism, Foundations vs. Virtues, (Blackwell Publishing.)
5. Campbell, J. (1993) ‘A Simple View of Color’, in Haldane, J. and Wright, C. (eds.), Reality, Representation and Projection, (Oxford University Press.)