Ragusa, Maria Alessandra http://orcid.org/0000-0001-6611-6370
Wu, Fan
Funding for this research was provided by:
Gruppo Nazionale per l’Analisi Matematica, la Probabilità e le loro Applicazioni
RUDN University (5-100)
Article History
Received: 26 October 2019
Revised: 20 March 2020
Accepted: 14 May 2020
First Online: 12 June 2020
Compliance with ethical standards
:
: The authors declare that there is no conflict of interest.