Submitted on: 19 February 2000.
Revised on: 31 March 2000.
Accepted on: 13 May 2000.
___________________International Journal of Structural Integrity
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Submitted on: 03 February 2006.
Revised on: 24 March 2006.
Accepted on: 12 May 2006.
___________________International Journal of Structural Integrity
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Submitted on: 13 October 2001.
Revised on: 08 November 2001.
Accepted on: 14 December 2001.
___________________International Journal of Structural Integrity
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