Affiliation: | aComputer Science Department, Faculty of Sciences of Tunis, University Campus, 1060 Tunis, Tunisia;bCRIL-CNRS, Lille Nord University, Rue de l’université, 62307 Lens cedex, France;cLIMOS-CNRS, Blaise Pascal University (Clermont Ferrand 2), Campus des cézeaux, 63173 Aubière cedex, France |