Submitted on: 29 May 1998.
Revised on: 14 July 1998.
Accepted on: 05 September 1998.
___________________International Journal of Critical Infrastructure Protection
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Submitted on: 24 April 2006.
Revised on: 22 August 2006.
Accepted on: 02 September 2006.
___________________International Journal of Critical Infrastructure Protection
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Submitted on: 01 October 2018.
Revised on: 28 December 2018.
Accepted on: 03 February 2019.
___________________International Journal of Critical Infrastructure Protection
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Submitted on: 05 June 2009.
Revised on: 26 June 2009.
Accepted on: 01 August 2009.
___________________International Journal of Critical Infrastructure Protection
Submitted on: 20 December 2007.
Revised on: 06 April 2008.
Accepted on: 20 April 2008.
___________________International Journal of Critical Infrastructure Protection