1. Faculty of Mathematical Physical and Natural Sciences of Tunis, SERCOM Laboratory, Tunis El Manar University, Tunis, Tunisia
2. Faculty of Law Economics and Management of Jendouba, VPNC Laboratory, Jendouba University, Jendouba, Tunisia
3. Polytechnic School of Tunisia, SERCOM Laboratory, Carthage University, INSAT, Tunis, Tunisia