1. Davis, P. J.: 1972, ?Fidelity in Mathematical Discourse: Is 1+1 Really 2??,American Mathematical Monthly 78, 252?63.
2. Davis, P. J. and R. Hersh: 1981,The Mathematical Experience, Houghton Mifflin Company, Boston.
3. Goffman, E.: 1959,The Presentation of Self in Everyday Life, Doubleday Anchor Books, New York.
4. Halmos, P.: 1981, ?Applied Mathematics is Bad Mathematics?, in L. Steen (ed.),Mathematics Tomorrow, Birkhäuser, Boston.
5. Lakatos, J.: 1978,Proofs and Refutations, J. Worrall and E. Zahar (eds.), Cambridge University Press, Cambridge.