Affiliation: | 1. Department of Computer Science, Badji Mokhtar-Annaba University, P.O. Box 12, 23000 Annaba, Algeria;2. LabSTIC Laboratory, 8 May 1945 University, P.O. Box 401, 24000 Guelma, Algeria;3. LIASD, Paris 8 University, France;4. DIMES, Universita? della Calabria, Via P. Bucci, cubo 41c - 87036 - Rende (CS) - Italy |