1. University of Naples “Federico II” & IMEM-CNR,Naples & Parma,Italy
2. University of Pisa,Dep. of Information Engineering,Pisa,Italy
3. IMEM-CNR National Research Council of Italy,Parma,Italy
4. IIT-CNR National Research Council of Italy,Pisa,Italy
5. eCampus University,IMEM-CNR Novedrate (CO),Parma,Italy