1.
Shapiro S. Thinking about Mathematics: The Philosophy of Mathematics. Oxford University Press; 2000.
2.
Bostock D. Philosophy of Mathematics: An Introduction. Wiley-Blackwell; 2009.
3.
Tiles M. Mathematics and the Image of Reason. Vol Philosophical issues in science. Routledge; 1991. https://www.vlebooks.com/vleweb/product/openreader?id=GlasgowUni&isbn=9781134967728
4.
Grayling AC. Philosophy. Oxford University Press; 1998.
5.
Benacerraf P, Putnam H. Philosophy of Mathematics: Selected Readings. 2nd ed. Cambridge University Press; 1983.
6.
Copi IM. The Theory of Logical Types. Vol Monographs in modern logic series. Routledge & Kegan Paul; 1971.
7.
Chihara CS. Ontology and the Vicious-Circle Principle. Cornell University Press; 1973.