Fabrizio Baiardi, Claudio Telmon. A Theoretical Model for the Average Impact of Attacks on Billing Infrastructures. In Vladimir Gorodetsky, Igor V. Kotenko, Victor A. Skormin, editors, Computer Network Security, Third International Workshop on Mathematical Methods, Models, and Architectures for Computer Network Security, MMM-ACNS 2005, St. Petersburg, Russia, September 25-27, 2005, Proceedings. Volume 3685 of Lecture Notes in Computer Science, pages 298-310, Springer, 2005. [doi]