S.K. Katsikas, A.N. Yannacopoulos, S. Gritzalis, C. Lambrinoudakis and P. Hatzopoulos, “How much should we pay for security?”, in Proceedings, IFIP 11.1/11.5 Joint Working Conference on Security Management, Integrity and Internal Control in Information Systems, Fairfax, Virginia, σελ. 59-70, Fairfax, VA, USA, 2005.