Funding for this research was provided by:
Fondazione di Sardegna (research project “Algorithms for Approximation with Applications (Acube)”)
Regione Autonoma della Sardegna (RASSR57257)
Received: 3 January 2021
Accepted: 3 May 2021
First Online: 1 June 2021
: The authors declare that they have no competing interests.