http://reply.papertrans.cn/3/232/23199/23199-31.png
http://reply.papertrans.cn/3/232/23199/23199-32.png
Submitted on: 13 March 2012.
Revised on: 09 April 2012.
Accepted on: 30 April 2012.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
Submitted on: 09 June 2011.
Revised on: 17 July 2011.
Accepted on: 27 July 2011.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
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Submitted on: 16 April 2011.
Revised on: 24 April 2011.
Accepted on: 12 May 2011.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS