Alho, A. http://orcid.org/0000-0002-5753-8333
Calogero, S.
Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/85194/2012, PTDC/MAT-ANA/1275/2014, UID/MAT/04459/2013)
Article History
Received: 20 July 2018
Accepted: 18 December 2018
First Online: 23 February 2019