Costarelli, Danilo https://orcid.org/0000-0001-8834-8877
Vinti, Gianluca
Funding for this research was provided by:
Gruppo Nazionale per l’Analisi Matematica, la Probabilità e le loro Applicazioni
Department of Mathematics and Computer Science of the University of Perugia
Fondazione Cassa di Risparmio di Perugia
Article History
Received: 13 August 2018
Revised: 28 May 2019
Accepted: 5 July 2019
First Online: 13 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.