1. The Cgal project homepage, http://www.cgal.org/
2. The Core library homepage, http://www.cs.nyu.edu/exact/core/
3. The Exacus homepage, http://www.mpi-sb.mpg.de/projects/EXACUS/
4. Generic programming techniques, http://www.boost.org/more/generic_programming.html
5. The GNU MP bignum library, http://www.swox.com/gmp/