1. Audi R.: Reasons/causes. In: Dancy, J., Sosa, E. (eds) A companion to epistemology, pp. 424–426. Blackwell, Oxford (1992)
2. Avigad, J., Dean, E., & Mumma J. (2008). A formal system for Euclid’s Elements. Review of Symbolic Logic, forthcoming.
3. Boghossian P.: Epistemic rules. Journal of Philosophy 105(9), 472–500 (2008)
4. Byrne O.: The first six books of the elements of Euclid. William Pickering, London (1847)
5. Coliva A.: Wright and McDowell on the content of experience and the justification of empirical beliefs. Lingua e Stile 36(1), 3–23 (2001)