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Submitted on: 21 March 2000.
Revised on: 24 June 2000.
Accepted on: 11 August 2000.
___________________COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS
Submitted on: 16 January 2005.
Revised on: 24 April 2005.
Accepted on: 19 June 2005.
___________________COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS
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http://reply.papertrans.cn/1/61/6024/6024-25.png
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Submitted on: 20 June 2007.
Revised on: 17 August 2007.
Accepted on: 25 September 2007.
___________________COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS
http://reply.papertrans.cn/1/61/6024/6024-29.png
Submitted on: 18 June 2001.
Revised on: 26 July 2001.
Accepted on: 24 September 2001.
___________________COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS