Submitted on: 17 February 2003.
Revised on: 22 March 2003.
Accepted on: 06 April 2003.
___________________European Journal of Computational Mechanics
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Submitted on: 11 April 2004.
Revised on: 18 July 2004.
Accepted on: 18 August 2004.
___________________European Journal of Computational Mechanics
Submitted on: 06 February 2007.
Revised on: 11 March 2007.
Accepted on: 26 March 2007.
___________________European Journal of Computational Mechanics
Submitted on: 29 June 2003.
Revised on: 21 July 2003.
Accepted on: 31 August 2003.
___________________European Journal of Computational Mechanics
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