1. Burkard, R.E.: Selected topics on assignment problems. Discrete Applied Mathematics 123, 257–302 (2002)
2. Press, W.H., Flannery, B.P., Teukolsky, S.A., Vetterling, W.T.: Numerical Recipes in C++. Cambr. Univ. Press, New York
3. Melhorn, K., Näher, S.: LEDA A Platform for Combinatorial and Geometric Computing. Cambridge University Press, Cambridge (1999)
4. Synaps. Available at,
http://www.inria.fr/galaad/logiciels/synaps/inex.html