Funding for this research was provided by:
Gruppo Nazionale per l’Analisi Matematica, la Probabilità e le loro Applicazioni (visiting professor program 2018 and 2019)
Ministero dell’Istruzione, dell’Università e della Ricerca (FFABR 2017)
University of Ferrara (FAR 2017, 2018)
Article History
Received: 25 June 2019
Accepted: 16 November 2019
First Online: 25 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
Free to read: This content has been made available to all.