Karlovich, Alexei Yu. http://orcid.org/0000-0002-6815-0561
Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (UID/MAT/00297/2019)
Article History
Received: 2 April 2019
Revised: 16 January 2020
Accepted: 3 June 2020
First Online: 19 June 2020