| Affiliation: | 1. Dipartimento di Matematica, Università di Torino, via Carlo Alberto 10, 10123 Torino, Italy;2. University of Vienna, Faculty of Mathematics, Oskar-Morgenstern-Platz 1 A-1090 Wien, Austria;3. Dipartimento di Scienze Matematiche, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;1. Faculty of Mathematics and Computer Science, University of Hagen, 58084 Hagen, Germany;2. Department of Computer Science, University of Technology Dortmund, 44227 Dortmund, Germany;1. School of Economics, UNSW Australia, Sydney, NSW 2052, Australia;2. Business Intelligence and Smart Services Institute, Maastricht University, Maastricht, The Netherlands |
