Franzen, Anne T. http://orcid.org/0000-0002-3405-1776
Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (SFRH/BPD/115959/2016, PTDC/MAT-ANA/1275/2014)
Fundação para a Ciência e a Tecnologia (UID/MAT/04459/2013)
Article History
Received: 28 August 2019
Accepted: 5 February 2020
First Online: 19 February 2020