1. Boolos, G. (1998). Must we believe in set theory? In R. Jeffrey (Ed.), Logic, logic, and logic (pp. 120–131). Cambridge: Harvard University Press.
2. Boyd, R. (1980). Scientific realism and naturalistic epistemology. In Proceedings of the philosophy of science association (vol. 2, pp. 613–662). East Lansing: Philosophy of Science Association.
3. Boyd, R. (1990). Realism, approximate truth, and philosophical method. In C. W. Savage (Ed.), Scientific theories. Minnesota studies in the philosophy of science (vol. XIV, pp. 355–391). Minneapolis: University of Minnesota Press.
4. Burgess, J. P. (2005). Fixing Frege. Oxford: Oxford University Press.
5. Burgess, J. P., Rosen, G. (1997). A subject with no object. Oxford: Oxford University Press.