S.K. Katsikas, “Assuring Critical Information Infrastructure”, in Proceedings, NATO Advanced Research Workshop on Cyberspace Security and Defense: Research Issues, Gdansk, Poland, σελ. 43-55, 2005.
Geneiatakis D., Kambourakis G., Dagiuklas T., Lambrinoudakis C., Gritzalis S., “SIP Security Mechanisms: A state-of-the-art review”, Proceedings of the 5th International Network Conference (INC’2005), S. Furnell, S. Katsikas (Eds.), pp. 147-156, Samos, Greece, July 2005.