1. Ayer, A., 1981,Proposiciones básicas, trad. M.M. Valdés, Instituto de Investigaciones Filosóficas-UNAM, México.
2. Benacerraf, P., 1998, "Mathematical Truth", en Benacerrafy Putnam 1998, pp. 403-420.
3. Benacerraf, P. y H. Putnam (comps.), 1998, Philosophy of Mathematics. Selected Readings, 2a. ed., Cambridge University Press, Cambridge
4. Bolzano, B., 1999, "Contributions to a Better-Grounded Presentation of Math-ematics", trad. S. Russ, en W. Ewald (comp.), From Kant to Hilbert: A Source Book in the Foundations of Mathematics, vol. 1, Oxford University Press, Oxford, pp. 174-224.
5. Boolos, G., 1999, Logic, Logic, and Logic, Harvard University Press, Cambridge.