1. Reflections on Skolem's Paradox;Bays,2000
2. What the numbers could not be;Benacerraf,1983
3. Skolem and the skeptic;Benacerraf;Proceedings of the Aristotelian Society,1985
4. Mathematical Logic.;Ebbinghaus,1994
5. Quantification over the real numbers;Fine;Philosophical Studies,1968