[1] Univ North Texas, Dept Comp Sci & Engn, 3940 N Elm,Room F201, Denton, TX 76207 USA
[2] Univ New Brunswick, Fac Comp Sci, ITC Bldg,550 Windsor St, Fredericton, NB E3B 5A3, Canada
[3] Ecole Natl Super Informat, Lab Methodes Concept Syst, Algiers, Algeria
[4] Univ Paris Saclay, CNRS, Telecom SudParis, SAMOVAR, 9 Rue Charles Fourier, F-91011 Evry, France