1. Faculté de chimie, Laboratoire de Chimie Théorique Computationnelle et Photonique, Algiers, Algeria
2. Ecole Normale Supérieure, Kouba, Algeria
3. Faculty of Electronic and Computer Science, Team VNets, RIIMA Laboratory, Department of Computer Science, University of Science and Technology Houari Boumediene (USTHB), Algiers, Algeria