Affiliation: | Department of Computer Science, University of Rome “La Sapienza” Via Salaria 113, 00198, Roma, Italyf1;Department of Computer Science, Systems and Communication, University of Milano Bicocca, Via Bicocca degli Arcimboldi 8, 20126, Milano, Italy, f2;Department of Electronics for Automation, University of Brescia, Via Branze 38, 25123, Brescia, Italy, f3;Institute of Mathematics of the Romanian Academy, 1-764, 70700, Bucure ti, Romania, f4 |