Bardoscia, Marco
Battiston, Stefano https://orcid.org/0000-0002-0051-973X
Caccioli, Fabio
Caldarelli, Guido https://orcid.org/0000-0001-9377-3616
Article History
Received: 15 June 2016
Accepted: 23 December 2016
First Online: 21 February 2017
Competing interests
: The authors declare no competing financial interests.