Submitted on: 23 July 2005.
Revised on: 18 October 2005.
Accepted on: 11 December 2005.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
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Submitted on: 08 January 2005.
Revised on: 08 February 2005.
Accepted on: 07 April 2005.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
Submitted on: 19 April 2011.
Revised on: 11 June 2011.
Accepted on: 10 August 2011.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
Submitted on: 23 November 1999.
Revised on: 08 January 2000.
Accepted on: 12 February 2000.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
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Submitted on: 08 July 2005.
Revised on: 17 September 2005.
Accepted on: 10 November 2005.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
Submitted on: 06 February 2015.
Revised on: 14 April 2015.
Accepted on: 11 June 2015.
___________________JOURNAL OF NONLINEAR SCIENCE---SPRINGER
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