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http://reply.papertrans.cn/3/266/26502/26502-12.png
http://reply.papertrans.cn/3/266/26502/26502-13.png
Submitted on: 22 February 2000.
Revised on: 25 March 2000.
Accepted on: 16 April 2000.
Results in Physics
http://reply.papertrans.cn/3/266/26502/26502-15.png
Submitted on: 18 June 2001.
Revised on: 21 July 2001.
Accepted on: 13 August 2001.
Results in Physics
Submitted on: 03 March 2013.
Revised on: 04 April 2013.
Accepted on: 01 May 2013.
Results in Physics---ELSEVIER
Submitted on: 21 September 2006.
Revised on: 22 October 2006.
Accepted on: 16 November 2006.
Results in Physics---ELSEVIER
Submitted on: 31 October 2006.
Revised on: 13 December 2006.
Accepted on: 26 December 2006.
Results in Physics
Submitted on: 20 August 2004.
Revised on: 28 September 2004.
Accepted on: 14 October 2004.
Results in Physics---ELSEVIER