1. Instituto Telecomunicações, Coimbra, Portugal
2. Faculty of Science and Technology, Nanzan University, Nagoya, Japan
3. Instituto de Matemática Pura e Aplicada (IMPA), Rio de Janeiro, Brazil
4. Department of Applied Mathematics, IMECC-UNICAMP, University of Campinas, Campinas, Brazil
5. MINES ParisTech, PSL Research University, CMA Centre de Mathématiques Appliquées, Sophia Antipolis, France