1. Borges, J.L. (2000). The library of Babel. Emece.
2. Caramello, O. (2010). The unification of mathematics via topos theory, arXiv: 1006.3930 .
3. Connes, A.A View of Mathematics. http://www.alainconnes.org/en/downloads.php .
4. de Saint-Exupéry, A. (1945). Le petit prince. Gallimard.
5. Dirac, P.A.M. (1930). Principles of quantum mechanics, Cambridge University Press.