Funding for this research was provided by:
Slovene Human Resources Development and Scholarship Fund (11011-49/2011)
Javna Agencija za Raziskovalno Dejavnost RS (P2-0103)
Javna Agencija za Raziskovalno Dejavnost RS (P5-0093 (B))
European Commission (ICT-2013-612944)
European Commission (ICT-2013-604102)
Article History
Received: 1 December 2015
Accepted: 6 March 2016
First Online: 22 March 2016