Authors
Namur Center for Complex Systems (NAXYS)
Department of Mathematics
University of Bologna
E-mail: margherita(dot)porcelli(at)unibo(dot)it
Namur Center for Complex Systems (NAXYS)
University of Namur
61, rue de Bruxelles
B5000 - Namur, Belgium
Phone: +32-81-724917
E-mail: philippe(dot)toint(at)unamur(dot)be