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Submitted on: 15 December 1998.
Revised on: 15 March 1999.
Accepted on: 12 May 1999.
___________________FINITE ELEMENTS IN ANALYSIS AND DESIGN
Submitted on: 16 December 1999.
Revised on: 27 March 2000.
Accepted on: 28 April 2000.
___________________FINITE ELEMENTS IN ANALYSIS AND DESIGN
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http://reply.papertrans.cn/1/98/9783/9783-35.png
Submitted on: 18 June 2013.
Revised on: 18 August 2013.
Accepted on: 09 October 2013.
___________________FINITE ELEMENTS IN ANALYSIS AND DESIGN