1. European Council, Council Directive 2008/114/EC of 8 December 2008 on the identification and designation of European critical infrastructures and the assessment of the need to improve their protection, Brussels, Belgium, 2008.
2. E.M. Brunner and M. Suter, International CIIP Handbook 2008/2009, Center for Security Studies, Zurich, Switzerland, 2008.
3. National commission on terrorist attacks upon the United States, The 9/11 Commission Report, New York, USA (http://govinfo.library.unt.edu/911/report/index.htm), 2004.
4. Blackout August 14, 2003: Final Report, New York, USA (http://www.nyiso.com/public/webdocs/media_room/press_releases/2005/blackout_rpt_final.pdf), 2005.
5. Report of the Enquiry Committee on Grid Disturbance in Northern Region on 30th July 2012 and in Northern, Eastern & North-Eastern Region on 31st July 2012, New Delhi, India (http://www.powermin.nic.in/pdf/GRID_ENQ_REP_16_8_12.pdf), 2012.