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Submitted on: 17 June 2018.
Revised on: 11 July 2018.
Accepted on: 04 August 2018.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
Submitted on: 01 September 2007.
Revised on: 15 September 2007.
Accepted on: 07 October 2007.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
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Submitted on: 29 July 2018.
Revised on: 16 August 2018.
Accepted on: 24 August 2018.
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS