| Affiliation: | (1) Department of Informatics, Alexander Technological Educational Institution, P.O. BOX 141, GR-57400 Thessaloniki, Greece;(2) Department of Computer Science, University of Alabama, 101 Houser Hall, Box 870290, Tuscaloosa, AL 35487-0290, USA;(3) Dipartimento di Ingegneria Elettrica, Universita’ degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy;(4) DISI, University of Trento, Via Sommarive 14, I-38050 Trento, Italy;(5) Department of Computing Science, University of Alberta, Edmonton, T6G 2E8, AB, Canada |
