Salgado, David
Sanguiao, Luis
Oancea, Bogdan
Barragán, Sandra
Necula, Marian
Funding for this research was provided by:
European Statistical System (847375-2018-NL-BIGDATA)
Article History
Received: 2 September 2020
Accepted: 19 April 2021
First Online: 29 April 2021
Competing interests
: The authors declare that they have no competing interests.