1. Duhem, P. (1991). The aim and structure of physical theory. Princeton: Princeton University Press.
2. Field, H. (2000). Apriority as an evaluative notion. In P. Boghossian & C. Peacocke (Eds.), New essays on the a priori (pp. 117–149). Oxford: Oxford University Press.
3. Gödel, K. (1983). Russell’s mathematical logic. In P. Benacerraf & H. Putnam (Eds.), Philosophy of mathematics: Selected readings (2nd ed.). Cambridge: Cambridge University Press.
4. Gupta, A. (2015). “Definitions,” in Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/definitions/.
5. Gupta, A., & Belnap, N. (1993). The revision theory of truth. Cambridge, MA: MIT Press.