1. Laboratoire de Mathématiques et Sciences Appliquées, Université de Ghardaia, Ghardaia, Algérie
2. Jabalia Camp, United Nations Relief and Works Agency, Palestinian Refugee Camp, Gaza Strip Jabalya, Palestine
3. Faculty of Sciences and Technology, Saad Dahlab University, Blida, Algeria
4. Department of Mathematics, Faculty of Basic Science, Bu-Ali Sina University, Hamedan, Iran
5. Department of Computer Science and Engineering, European University Cyprus, Nicosia, Cyprus
6. CIICESI-ESTG, Politecnico do Porto, Felgueiras, Portugal