Submitted on: 28 November 2015.
Revised on: 15 February 2016.
Accepted on: 06 March 2016.
___________________Advances in Nonlinear Analysis
Submitted on: 23 May 2018.
Revised on: 08 September 2018.
Accepted on: 03 November 2018.
___________________Advances in Nonlinear Analysis
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Submitted on: 08 April 2011.
Revised on: 06 June 2011.
Accepted on: 28 July 2011.
___________________Advances in Nonlinear Analysis
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Submitted on: 14 October 2017.
Revised on: 08 January 2018.
Accepted on: 22 February 2018.
___________________Advances in Nonlinear Analysis
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Submitted on: 25 May 2000.
Revised on: 11 August 2000.
Accepted on: 04 September 2000.
___________________Advances in Nonlinear Analysis