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Submitted on: 21 July 2003.
Revised on: 02 October 2003.
Accepted on: 29 October 2003.
___________________Advances in Mathematical Physics
Submitted on: 02 January 2001.
Revised on: 10 March 2001.
Accepted on: 31 March 2001.
___________________Advances in Mathematical Physics
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http://reply.papertrans.cn/1/8/764/764-15.png
Submitted on: 10 September 2000.
Revised on: 08 October 2000.
Accepted on: 29 October 2000.
___________________Advances in Mathematical Physics
Submitted on: 11 March 2001.
Revised on: 06 July 2001.
Accepted on: 21 July 2001.
___________________Advances in Mathematical Physics
Submitted on: 14 July 2013.
Revised on: 16 September 2013.
Accepted on: 12 November 2013.
___________________Advances in Mathematical Physics
Submitted on: 04 April 2024.
Revised on: 16 May 2024.
Accepted on: 01 July 2024.
___________________Advances in Mathematical Physics
Submitted on: 15 January 2003.
Revised on: 19 March 2003.
Accepted on: 16 April 2003.
___________________Advances in Mathematical Physics