1. J. Moteff, Critical infrastructures: background, policy, and implementation, Report for Congress. Received through the CRS Web, Order Code RL30153, The Library of Congress, 2003.
2. J. Moteff, C. Copeland, J. Fischer, Critical infrastructures: What makes an infrastructure critical? Report for Congress, Received through the CRS Web, Order Code RL31556, The Library of Congress, 2003.
3. K.A. Brown, Critical Path: A Brief History of Critical Infrastructure Protection in the United States, Fairfax: Spectrum, 2006.
4. The challenges for European critical infrastructure protection;Pursiainen;J. Eur. Integr.,2009
5. European Council On the identification and designation of European critical infrastructures and the assessment of the need to improve their protection, Council Directive 2008/114/EC of 8 December 2008, 2008.