Jean-Francis Michon is Computer Science Professor and Director of the LIFAR (Computer Science Laboratory) at University of Rouen, France.
Pierre Valarcher is Computer Science Assistant Professor and Member of the LACL (Computer Science Laboratory) at University of Paris XII, France.
Jean-Baptiste Yunès is Computer Science Assistant Professor and Member of the LIAFA (Computer Science Laboratory) at University of Paris VII - Denis Diderot, France.