1. Research Center E. Piaggio, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56122, Italy, https://orcid.org/0000-0002-5918-3695 (H.G.), https://orcid.org/0000-0001-5697-6027 (A.D.A.), https://orcid.org/0000-0003-4023-4111 (F.M.), https://orcid.org/0000-0002-1368-3571 (C.D.M.)
2. Department of Information Engineering, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56122, Italy
3. Research Center E. Piaggio, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56122, Italy; and Department of Information Engineering, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56122, Italy (Corresponding author), e-mail: g.vozzi@ing.unipi.it, https://orcid.org/0000-0002-9414-9994