Submitted on: 12 August 1999.
Revised on: 14 October 1999.
Accepted on: 16 November 1999.
___________________Communications in Computational Physics
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Submitted on: 04 April 2000.
Revised on: 22 July 2000.
Accepted on: 26 August 2000.
___________________Communications in Computational Physics
Submitted on: 03 August 2012.
Revised on: 02 November 2012.
Accepted on: 29 November 2012.
___________________Communications in Computational Physics
Submitted on: 05 May 2022.
Revised on: 09 August 2022.
Accepted on: 25 August 2022.
___________________Communications in Computational Physics
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