1. Department of Informatics and Telecommunications (formerly Department of Computer Science and Technology and Department of Telecommunications Science); University of Peloponnese; Tripoli Greece
2. Mathematical and Algorithmic Sciences Laboratory; Paris Research Center, Huawei Technologies France SASU; Boulogne-Billancourt France
3. Department of Informatics and Telecommunications; National and Kapodistrian University of Athens; Athens Greece
4. School of Information Engineering; Yangzhou University; Yangzhou China