G. Antzoulatos, G. Orfanidis, P. Giannakeris, G. Tzanetis, G. Stathopoulos, N. Kopalidis, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, “Severity level assessment from semantically fused video content analysis for physical threat detection in ground segments of space systems.”, in Proceedings of the 2nd International Workshop on Cyber-Physical Security for Critical Infrastructures Protection (CPS4CIP 2021), 4-8 October 2021.