Stoupas, Georgios http://orcid.org/0000-0003-4793-4911
Sidiropoulos, Antonis http://orcid.org/0000-0002-3352-0868
Gogoglou, Antonia http://orcid.org/0000-0002-9914-5327
Katsaros, Dimitrios http://orcid.org/0000-0003-3473-4187
Manolopoulos, Yannis http://orcid.org/0000-0003-4026-4329
Article History
Received: 5 October 2017
First Online: 16 April 2018