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Submitted on: 13 May 2002.
Revised on: 28 July 2002.
Accepted on: 12 August 2002.
___________________JOURNAL OF SANDWICH STRUCTURES & MATERIALS
Submitted on: 25 January 2000.
Revised on: 21 May 2000.
Accepted on: 02 July 2000.
___________________JOURNAL OF SANDWICH STRUCTURES & MATERIALS