1. A Theory of Universals;Armstrong,1978
2. Language, Truth and Logic;Ayer,1946
3. Metaphysical Myths, Mathematical Practice;Azzouni,1994
4. M. Balaguer. “Knowledge of Mathematical Objects,” PhD Dissertation, CUNY Graduate Center, New York, 1992.
5. Against (Maddian) Naturalized Platonism;Balaguer;Philosophia Mathematica,1994