I. Gialampoukidis, G. Kalpakis, T. Tsikrika, S. Papadopoulos, S. Vrochidis, I. Kompatsiaris, “Detection of Terrorism-related Twitter Communities using Centrality Scores“, In Proceedings of International Workshop on Multimedia Forensics and Security (MFSec 2017), Bucharest, Romania, 6 June 2017.