1. Bostock, David: 1974, Logic and Arithmetic, Volume I, Oxford Press, New York and Oxford.
2. Burge, Tyler: 1980, ?Truth and Singular Terms?, reprinted in Mark Platts (ed.), Reference, Truth and Reality, Routledge & Kegan Paul, London, Boston, and Henley.
3. Dummett, Michael: 1973, Frege: The Philosophy of Language, Duckworth, London.
4. Dummett, Michael: 1981, The Interpretation of Frege's Philosophy, Harvard University Press, Cambridge, Massachussetts.
5. Frege, Gottlob: 1964, The Basic Laws of Arithmetic, University of California Press, Berkeley.