1. Department of Mathematics, Informatics and Geosciences, University of Trieste, Trieste, Italy
2. Department of Mathematics and Geosciences, University of Trieste, Trieste, Italy
3. Delft Center for Systems and Control, TU Delft University, Delft, The Netherlands
4. School of Computer Science and Statistics, Trinity College, Dublin, Ireland
5. SISSA, International School for Advanced Studies, Trieste, Italy
6. Department of Computer Science, University of Oxford, Oxford, U.K.