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Submitted on: 05 February 2001.
Revised on: 06 May 2001.
Accepted on: 05 June 2001.
___________________Journal of Computational Electronics
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Submitted on: 15 February 2003.
Revised on: 24 March 2003.
Accepted on: 22 May 2003.
___________________Journal of Computational Electronics
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Submitted on: 12 July 2000.
Revised on: 23 August 2000.
Accepted on: 07 September 2000.
___________________Journal of Computational Electronics
Submitted on: 10 August 2004.
Revised on: 01 October 2004.
Accepted on: 26 October 2004.
___________________Journal of Computational Electronics
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