Ekström, Sven-Erik http://orcid.org/0000-0002-7875-7543
Furci, Isabella http://orcid.org/0000-0001-8864-6786
Serra-Capizzano, Stefano http://orcid.org/0000-0001-9477-109X
Funding for this research was provided by:
Istituto Nazionale di Alta Matematica “Francesco Severi” (GNCS2018)
Article History
Received: 9 March 2018
Accepted: 21 June 2018
First Online: 3 July 2018