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Submitted on: 30 April 2005.
Revised on: 23 May 2005.
Accepted on: 30 May 2005.
Mathematical and Computational Applications
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http://reply.papertrans.cn/3/215/21422/21422-24.png
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Submitted on: 23 August 2022.
Revised on: 14 September 2022.
Accepted on: 20 September 2022.
Mathematical and Computational Applications
http://reply.papertrans.cn/3/215/21422/21422-28.png
Submitted on: 07 November 2000.
Revised on: 22 November 2000.
Accepted on: 05 December 2000.
Mathematical and Computational Applications
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